An impact occurred causing the air to vibrate around. The clash occurred because two people were fighting in the air below them surrounded by rocky hills.

One of the fighting men threw a punch right at his opponent's face, the impact was so great that it sent the opponent flying for several kilometers.

The person who received the blow adjusted himself as he approached the ground, he managed to land standing still, but the impact of the blow from his opponent was so strong that his body was dragged backwards causing destruction to the ground he was on. After a while he was finally able to stop.

Issei rubbed his cheek that was hit by Veldanava, Veldanava's punch was so incredible that it could penetrate his defenses so easily.

He looked up, far ahead of him Veldanava was standing in the air, not moving an inch after he hit Issei.

Issei steeled his body, he stared intently at Veldanava and focused all his attention on the older Dragon. Then he jumped and charged towards his brother at a speed that the naked eye couldn't see, the ground exploded due to the result of Issei's jump.

Even so, Veldanava could still see Issei clearly. Issei already knew that, therefore he changed the direction of his jump and disappeared from Veldanava's sight.

Veldanava's eyes narrowed, he was predicting where Issei would attack from, then he felt something strong from behind him, he quickly turned around and caught Issei's punch with his right hand.

The result of the collision of the two of them made the ground beneath them erode by several meters. The air trembled and a strong gust of wind blew the rocks away.

Even though the resulting effect was extraordinary, Veldanava didn't move at all. He was still in place while resisting Issei's attack. Which frustrated Issei. He had done everything he could to deal a single blow to Veldanava, but so far to no avail.

Veldanava didn't budge at all. He still gripped Issei's punch tightly.

"Nice plan, doing a feint move and taking advantage of your speed to create an opening," Veldanava said to Issei, "I commend that, but…"

In the next move, Veldanava disappeared in an instant and appeared behind Issei.

"That's not enough."

Issei turned around quickly when he sensed danger from behind him, but it was in vain. Veldanava moved faster than Issei and instantly rewarded Issei with a punch to the stomach, which left him breathless.

"Gah!"

The result of the blow sent Issei flying straight to the ground, a tremendous impact occurred when Issei hit the ground, creating a huge cloud of dust that obscured the view. But Issei's body didn't stop there, his body was still dragged in and stopped a few meters from the ground.

Silence ensued.

Veldanava looked down where a cloud of dust covered the land, he stared at the location where he believed Issei was. He wondered what his brother would do next.

The explosion of power dispersed the accumulated dust, revealing Issei who was completely unharmed at the location where he fell. Only his clothes were dirty from the impact.

Issei then jumped and landed on the hill, not taking his eyes off Veldanava at all. He knew that if he let his guard down a little, then that very instant his defeat was decided.

After a moment of silence, but no one moved to make an attack. They both just stared at each other.

Veldanava then smiled and Issei smirked, both of them immediately moved in unison, continuing their fight.

Several days had passed since their battle began, their battle did not cover a single place, but covered the entire planet. That planet wasn't even worthy of being called a planet anymore, it had been devastated by the impact of the two True Dragons' battle.

There is hardly any land left on the rocky planet, everything has crumbled to dust, causing the planet to appear smaller. Thunderstorms struck everywhere, sea waves raged, earthquakes occurred incessantly. It could be said that the planet was in its dying period.

And what's worse, Issei and Veldanava didn't even fight at full strength, from the start they only used physical strength. If they had used their full power, the planet would have ended long ago.

Issei threw a punch but was immediately blocked by Veldanava's one hand, he knew that his attempt didn't work but he kept trying, he disappeared and appeared behind Veldanava in an instant, Issei gave a direct kick to the head but was restrained.

In less than a second, Issei had thrown over fifty attacks all of which Veldanava was able to dodge. The two of them fought at the speed of light that was impossible for the naked eye to see.

Soon they kept their distance with Issei who continued to stare at his opponent, not breaking his concentration.

"What a monster…." Issei thought with a sour expression, he had used Thought Acceleration and quickened his mind a million times to plan his attack, but it was all useless as Veldanava easily read it.

Issei sighed and smirked slightly. The opponent was a true monster that was impossible to beat, but Issei wouldn't give up. They fought not to determine win and lose, but to increase Issei's fighting experience which Veldanava was happy to help.

Just as Issei was preparing to attack, Veldanava suddenly said something.

"I think it's about time we stopped," Veldanava said, taking Issei off guard a little.

"Hah? Why?" Issei asked a little disappointed.

"This planet won't last much longer, isn't that our time limit?" Veldanava said.

Issei looked around him and realized that their fight caused the world a great destruction.

"I think you're right," said Issei, he relaxed his body and calmed his strength.

"Let's move," said the older Dragon.

After that they used teleportation and moved to Veldanava's house. Issei immediately plopped down on the terrace of the house and took a deep breath.

"Good work. You've made a lot of progress," Veldanava praised.

"You're kidding, right? I couldn't even throw a single punch at you," Issei replied.

"Indeed, but your speed is amazing and you are very good at dodging."

"Ha ha, I guess I'm used to it."

It reminded Issei of his past, when he was caught peeking at the girls from the Kendo club changing clothes, he and his friends were immediately chased by more than twenty angry girls holding Shinai.

Issei and his friends were immediately beaten mercilessly, but that didn't reduce Issei's level of lewdness. After dozens of times being caught and beaten by the girls, Issei slowly began to be able to dodge their Shinai attacks.

Issei accidentally smiled remembering his past memories.

"Okay, now I'll go first."

Veldanava's words brought Issei out of his nostalgia. He got up and looked at his brother.

"Hmm? Go where?" Issei asked confused.

"There are some things I need to take care of."

"I see. Do you need help?"

"No, I can take care of it myself. If I need help, I will definitely let you know."

"Okay then," replied Issei. He then lazily fell asleep again.

If his brother said he didn't need help, then Issei wouldn't help him. He knew best that Veldanava was capable of taking care of whatever he was about to do.

"I'm leaving now."

Right after he said that, Veldanava disappeared. It seemed to have gone wherever it was headed.

Issei closed his eyes and tried to feel his brother's presence. Normally, Issei could easily find Veldanava's whereabouts, but this time he couldn't find him anywhere. That means there's only one thing that can cause it.

Veldanava had gone to a place Issei couldn't enter.

Seeing his efforts in vain, Issei opened his eyes again and saw the scene above him. No matter which way he looked, there was only a colorful view of the universe around him, which he never got tired of looking at.

After a while, he stood up and stretched his body.

"Now what will I do…" Issei pondered.

It's not that Issei doesn't have any activities, but he has so many things he wants to do that he's at a loss as to what to do first.

He then looked at his hands, he thought about continuing to make skills and master them. Recently he had learned how to make Skills from Veldanava that would help him in battle or other activities. But after the battle he had with Veldanava made him lazy to do heavy things for now. So he gave up on doing that for now.

"I guess I'll just take a shower," Issei said with a sigh, but he had a happy expression on his face. Because taking a shower after doing daily activities reminds him of his home.

Issei flew in his dragon form towards his destination, he could have used teleportation but he couldn't miss the pleasant sensation of flying in his dragon form.

His current destination is Earth, a blue planet full of life. The place where he was born and raised.

He hadn't been to earth since he got his new life, so he didn't know what the earth looked like now. But he was sure it wasn't the same as he remembered, because he was in a very distant past from the time he was born, perhaps millions of years apart.

Issei slowed his flight speed until he stopped, then he changed into his human form.

He had arrived at his destination and now he was staring at the planet he came from.

The earth was still as blue and beautiful as he remembered, only that there was a stark difference between the earth before him and the earth he remembered.

The earth he remembered had several large continents located far from each other, but the earth in front of him had a different continent layout than he remembered. Each of the islands was as close as possible as if they were once one island.

(If I remember correctly, Earth was once only one continent, right?)

If Issei's thoughts are correct, then the scene in front of him right now makes sense. Seeing that the large islands are moving away from each other suggests continental drift is taking place, although the process is very slow.

(Wait! Does that mean….)

A thought made Issei dumbfounded. A desire he had when he was a child suddenly surfaced. A desire that all young children may have even to their parents.

Issei's heartbeat was pounding with excitement, couldn't wait any longer he immediately teleported to earth.

Arriving at the earth, a gust of wind hit him making Issei close his eyes. After subsiding, he opened his eyes and was immediately stunned by the scene before him.

If only he still doubted Veldanava's words about him being thrown into the past, then this sight was undeniable proof that he had indeed been thrown into the distant past.

Issei is standing on a small hill, in front of him is a very wide meadow, on his right side flows a river whose water is very clear, on his left he sees a large forest and high hills behind him.

But that's not what made Issei stunned, but the residents.

What was in front of him were animals that had become extinct in his time, which he would never have been able to see. Only their fossils can be found. But what was in front of Issei was the real and still alive.

The animal is Dinosaurs, an animal that has perished in the future by the will of nature.

"Kuh! Damn it! I want to cry," said Issei who couldn't hold back his tears. How come? This was the first time he had seen a living being other than his brother.

In his long life, his life can be said to be monotonous.

He trained to perfect himself, fought with his brother to increase his fighting experience, and then he took a long sleep. Of the three activities, it was long sleep that he did the most. About 60% of his life he does long sleep, he does it purely to cut time. So that he could avoid boredom until Veldanava started the Age of Life.

So, upon seeing the scene full of life before his eyes, Issei let go of all his feelings. He laughed happily. Such a loose laugh without a single negative feeling.

Issei plopped down on the grass, and looked up at the blue sky. The cool wind blowing made him feel so peaceful.

There is one more thing about the earth today that the future earth cannot have. That is, there is no negative energy that is polluted throughout the world.

In the future where he comes from, the whole world is filled with negative energy. Hatred, anger, sadness, cruelty and all forms of negative energy are polluted in the air, making natural energy so rotten.

From what he had heard from Koneko, this was the main reason why Youkai avoided studying Senjutsu, because it would drive them crazy.

But different from the future, the natural energy that radiates now is so pure and clean. He could even feel the natural energy around him full of warmth.

Issei wanted to close his eyes and enjoy this comfort a little longer, but a growl stopped him. He got up and turned to the source of the growl, only to see something that frightened the adults.

Issei flinched a little but quickly calmed himself down, it's only natural when you come face to face with a Tyrannosaurus Rex or a T-Rex, which was one of the apex predators of the dinosaur age.

The T-Rex glared at Issei as if judging him, but Issei didn't budge and instead stared back at the beast. If he was his old self he would have run away in fear, but now he's different, he's the alpha here. He was the True Dragon who stood above all. A T-Rex that didn't even have supernatural powers was nothing to him.

Issei's golden eyes shone as he stared intently at the T-Rex, in that instant the beast gave a shrill roar before running into the depths of the forest.

Issei heaved a sigh of relief, if he wasn't there then the other dinosaurs would be the target of that predator. Although he slightly violated the laws of nature, he didn't really blame it.

"I'd better start exploring," Issei muttered, he then jumped and flew into the sky.

In the sky, Issei could see a wider view. Mostly he saw only meadows and forests, but in the distance he could see barren and rocky hills, then further west from where he was he could see a possibly active volcano.

Issei didn't go to any of those places because he already knew where he was going, far ahead he smelled the smell of the sea and there he was.

But before he rushed there, his attention was instantly drawn to a certain direction. In the middle of a river below, there was an egg stuck between the rocks in the middle of the river.

Out of curiosity, Issei descended and landed on the rock near the stuck egg. The river flow is not heavy so it does not damage the eggs. Issei reached out and took the egg carefully, it had a soft shell reminiscent of a lizard egg.

Not knowing what to do with the egg, Issei finally decided to take care of it. He put the egg into his Void Dimension, a personal dimension for himself, then he flew again to seek shelter.

After a few minutes of searching, he found a cave located on a fairly high ground. He entered and checked the contents of the cave, because he did not find anything strange, he decided to stay there.

He picked up some leaves and piled them up to lay an egg on top. Then he lit a bonfire to keep it warm.

"Is this the way? I've never taken care of a dinosaur egg before," Issei said while scratching his head.

Seeing that no other ideas came up, he decided to keep taking care of the eggs as he knew it. He didn't know how long it would take to incubate the eggs, but it didn't matter how long it took, because these activities could fill his time apart from training and sleeping.

The days turned into months, the egg still showed no signs of hatching. Issei of course wouldn't sit around waiting for the egg to hatch. Every day he would be out for about twelve hours exploring the world before returning to the cave.

Then one day, the egg made its first movement. Issei immediately got excited and watched the egg hatch, revealing the animal inside.

After fully hatching, Issei looked at the newborn animal. It wasn't a raptor or anything like that, but it looked like the flying reptile Issei knew. It has small and short legs, its hands have a membrane that connects to its body to form wings, a long neck, and the most iconic is its long and pointed mouth like a spear.

The beast was a Pterosaur, but Issei didn't know which genus it belonged to.

The little reptile then opened its mouth, letting out a small, hoarse screech. Issei then took out the fish he had gotten earlier, cut it into small pieces to make it easier for the little animal to eat it. After that he placed it near the animal.

The animal stared at the flesh of the fish before pinching the flesh and eating it slowly.

"Hey…" Issei couldn't help but caress the little animal. The animal seemed to be enjoying it. Issei chuckled seeing that.

"Hmm, how about I give you a name," Issei said as he put a hand on his chin to think, "How about Tero? Do you want that name?"

The animal responded with its hoarse voice, but Issei could understand that it was a positive reaction.

"Ha ha, looks like you like it. Alright, from now on your name is Tero," said Issei. Tero responded with a loud screech of approval.

Issei stroked Tero again. He decided to take care of him at least until Tero could live independently and meet his other species. It can also fill this long free time.

Time passes quickly. Tero who was once just a small reptile has now grown up, his height is even now taller than Issei.

Although Tero was originally a predator that reigned in the air, he never thought of Issei as his food. Tero thought of Issei as the one who had taken care of him since childhood. Their relationship has been very close since then.

Currently, Issei and Tero were flying side by side. The orange light from the afternoon hit them. They fly aimlessly trying to enjoy the cool natural scenery.

"Hey, Tero. This time it's your turn to find dinner," said Issei.

Tero let out a hoarse voice in response, Issei knew it was a sign of agreement.

"Good. Then I'll be waiting for you at home."

After that the two of them parted ways, with Issei returning to the cave and Tero looking for dinner. They have been doing this activity for years, so they are used to it.

Issei flew at high speed and arrived home quickly. Usually it takes Issei a long time to do it, that's because Tero can't keep up with his speed. But now that he was alone, he could fly even faster.

The cave that he found in the past had become a two-story house with the cave being Tero's residence, he used a Living Being Barrier around the house within a 5 kilometer range, so that any creature that came close would not be able to enter his residence, except for him and Tero.

Issei took the cooking utensils and seasonings for cooking and brought them to the spacious yard, he planned to cook outside.

After finishing preparing everything, Issei looked up at the sky. The sun had completely set and a clear night full of stars lay above him.

He thought of several things, the first of which was about his being here. He won't be staying here much longer, maybe just a few more years. He had to take a long sleep to speed up the passage of time until the start of the Age of Life.

Next he thought of Tero, his current closest friend. He could not leave Tero alone, before leaving he had to find out where the herd of Tero came from.

Issei was sad when he thought about leaving Tero, but he couldn't do anything. He is a True Dragon who has an unlimited lifespan, while Tero will one day die when the time comes. One day they have to separate, therefore Issei aims to find Tero's herd so that he doesn't feel alone.

While Issei was thinking about it all, he then felt something strange. Normally it would only take Tero an hour to return after hunting prey, but now that it had been three hours he still hadn't returned.

Issei sensed that something had happened to Tero so he hadn't come home yet. He then sniffed the air, his sense of smell had grown to be very sharp ever since he became a Dragon, with that he tried to follow the familiar smell of Tero.

Not long after Issei found out where Tero was from the smell, he without thinking then flew towards his friend's place. It didn't take him long to arrive at the location, when he arrived, he saw something that made him horrified.

At the end of his vision, Tero lay on the ground covered in blood.

"TERO!" Issei shouted in a worried tone.

Without thinking Issei immediately teleported to his friend's place. Up close Issei could see how serious Tero's condition was. The right half of his body was torn off, some of his flesh could not be found, blood pooled like a small pool.

The only evidence to suggest that Tero was still alive was the small moan that came out of him. But even so, that doesn't mean Tero's condition is safe.

"Damn it, Tero! What happened to you!?" Issei shouted with full of anxiety and worry.

His wounds were very severe, and judging by the condition of his wounds, Tero had been bitten by a predator bigger than him.

"Fuck it, there's no way I'm going to let you die here! I haven't taken you to your family yet!"

After saying that, Issei activated his healing skill on Tero, even though he just learned to use this at least his healing ability is equal to or higher than Asia's.

Tero's wound quickly closed, but it was still not enough. The lost flesh cannot be cured, if it continues like this Tero's condition is still in danger. Issei hasn't mastered the body regenerating skill in other people.

Issei heard some growls nearby. He turned his head and saw several raptors staring at him, perhaps they were provoked by the smell of Tero's blood. Issei thoughtlessly stretched out his right hand and sent Fire Skill [Fireball] at them, instantly annihilating the raptor without a trace.

In his angry state at the raptor's disturbance, Issei subconsciously changed his hand into his dragon form. His outstretched hand was covered in dark red hard scales.

Issei who was panting with anxiety then froze looking at his hands. He froze not because his hands had changed, but because he remembered something.

Several years ago he had mastered several healing techniques, one of which was body transplantation. When he saw his hand, he remembered the technique. If he could transfer some of his body parts to Tero, it might save him.

Issei then put his palm on Tero's body, then Issei's hand glowed and merged with Tero's body. Issei's hand which was full of very hard scales then flowed into Tero's body, replacing the torn flesh of Tero's body. While using healing skills, the transplant went smoothly and Tero's body returned to normal.

Issei doesn't have to worry about any damage done to his body, because in the end they will regenerate on their own.

After the transplant and healing, Issei still put Tero in the healing circle and brought him to their home. Arriving at the house, Issei placed Tero's body in the yard carefully.

Still recuperating, Issei saw that Tero's breathing had returned to normal, his friend now looked like he was sleeping. That's when Issei calmed down, he plopped down on the grass and breathed a sigh of relief for saving his friend.

Indeed, Issei was planning to part ways with Tero, but this was not the farewell he wanted. Now Tero is still under Issei's protection, but after he delivered Tero to his family, then he is no longer under Issei's protection. That's when they really parted ways.

There's nothing else to do, Issei decided to sleep. He activated his healing skill in automatic mode and would stop when Tero was fully healed.

The next day, Issei was woken up by something hard hitting his body. When he opened his eyes he saw that Tero was awake and fully recovered, his friend rubbed his pointed mouth at Issei.

Tero opened his mouth and let out a hoarse voice to give a greeting. Issei quickly got up and hugged his friend.

"Shit, don't make me worry like that," Issei said weakly. Tero let out a soft snore in return.

"You haven't eaten, have you? This time let me look for food, you stay here," said Issei, in return with a snoring Tero.

After that incident, Issei watched Tero more often with more vigilance when his friend went out. No more dangerous events happened because Issei didn't allow it. They lived in peace for a while.

Years later, Issei decides it is time he searched for the Tero family. Issei felt it was time for him to have a long sleep, he had spent too much time with Tero.

Of course he was very sad when he had to part with Tero, but they couldn't be together forever. Unlike the immortal Issei, Tero is a short-lived being. One day they will definitely separate because of the age factor.

Issei can't help Tero to continue with him, Tero must be able to survive without Issei's help. Therefore, Issei decided to take Tero to the family of the same species as Tero.

Currently Issei and Tero are flying in the sky while enjoying the wind blowing against them. Issei doesn't know Tero's species territorial territory, so he intends to explore the entire surface of this earth to find them.

Actually Issei could have used his power to find them, but it would be an instant trip. Issei didn't want that, he wanted to go on an adventure with Tero one last time before they parted ways.

After hours of flying exploring, Issei and Tero arrived at rocky cliffs adjacent to the sea. That's where Issei could see another herd of Tero, they were perched on the edge of a cliff while looking out to sea for prey.

Issei and Tero landed near the herd, when they landed the herd felt wary of their presence. Issei patted Tero to tell him to make sure they weren't a threat.

Tero came forward and tried to communicate with them, Issei just watched from afar. Soon Tero had mingled with the rest of the herd. They sometimes fly while targeting fish in the sea.

Issei is also accepted by them, they don't see him as food or foe. Their animal instinct told them not to attack Issei.

Issei doesn't know how animals express their feelings, but he can feel that Tero is currently very happy. It brought relief to Issei.

After hours with them, the sun was almost setting. Some of them have already returned to their nests.

Tero remained standing beside Issei while watching the herd leave. Issei could clearly feel Tero's desire to come with them.

"Go."

Tero looked at Issei with a confused look as he tilted his head.

"You want to go with them, right? Then go."

Tero let out a loud snoring showing that he didn't agree with what Issei was talking about at all.

"Your place is not beside me, but with your flock there. With them you can feel your real life," said Issei.

Tero's snoring got louder, he rubbed the corner of his pointed mouth against Issei's cheek. Issei rubbed Tero's pointy mouth gently.

"Ha ha, you were worried about me, huh? You don't have to worry, I'll be fine," Issei assured Tero with a smile.

"So, go."

Tero stared at Issei for a while then he turned his attention to his group that had just left. Tero started walking forward and spread his wings, then he turned to Issei once again. Issei gave a reassuring nod to Tero, Tero then jumped and flew towards the herd.

Issei looked at his friend away while waving his hand. Seeing Tero, Issei remembered the time when he first found Tero.

Memories of Tero started to flow inside Issei. Starting from him caring for Tero who was still an egg until he hatched, when he first fed Tero, when Tero began to learn to walk until he ran smoothly, when Tero began to learn to fly, when Tero grew up to be as tall as Issei, when Tero started his first hunt , and many other memories.

Issei's thoughts were cut off when he heard a loud scream that was more like a roar. Issei realized that it was Tero's voice that let out a farewell cry between the two of them.

Without Issei noticing, tears were running down his cheeks as he watched his best friend fly away. Issei remained standing where he was while waving, he kept watching Tero walk away and disappear behind the mountains. That's when he lowered his hand.

"Damn it… for the first time you made me cry, Tero."

Issei wiped the tears that flowed out of his eyes, after that he looked back at where Tero had disappeared with a smile.

"Goodbye."

After saying that, Issei teleported and left Earth. He then appeared where he used to take a long nap. It was a huge asteroid which had its own gravity and had been standing there for millions of years as far as Issei could tell.

Issei threw his body onto the mattress he had made and then relaxed his body. Unlike Veldanava who uses his dragon form to sleep long, Issei prefers his human form.

After pondering for a while, Issei decided it was time to sleep.

Years later, Issei woke up from his long slumber. He looked around him and realized nothing had changed since the last time he saw him.

Issei got up from his bed then stretched himself. He saw that the bed was completely undamaged, of course it was because it was protected by magic.

Issei then used his perception ability to detect Veldanava's whereabouts, he extended his perception to where his older brother usually was. Soon he felt that his brother was indeed there and was having a long sleep.

Issei sighed.

"Still not huh…"

It was something Issei used to do after he had a long sleep. After waking up he would check how Veldanava was doing, if his brother was sleeping then it was not time for the Age of Life to begin.

Issei pondered what he should do to fill this unlimited free time.

"How is Tero doing, huh…"

Issei knew there was no point in thinking about it, it's been years since they separated, Tero should be dead by now. But still, Issei was still thinking about Tero.

Suddenly a desire to visit earth appeared in Issei's mind. Even though he would never meet Tero again, at least he wanted to make a 'Sign' in memory of his friend.

Then Issei teleported and stood outside the Earth, he saw that now the Earth was much more similar to the one he remembered when he was Issei Hyoudo. It proved that it had been a very long time since he had parted ways with Tero.

Suddenly Issei felt something very familiar on Earth, something that was very similar to his energy magicule. Feeling curious, Issei teleported towards Earth.

Issei arrived at a rocky hillside, on top of that hill he could feel that the air was still as clean as the last time he was here, it means that the earth has not been polluted by hatred.

Issei then looked at the place where he felt the energy magicule belonged to him, only this one was much smaller than Issei's. Whoever has that energy catches Issei's attention.

The source of energy was a few miles from where Issei was standing, Issei was planning to go there but he stopped when he felt the energy move. The energy was moving towards Issei's place at high speed.

Before long a large shadow covered the land, a strong gust of wind swept through the area around Issei. Issei narrowed his eyes when he saw the giant shadow descend.

Then Issei's eyes widen when he can now clearly sense the existence of the giant creature, it does have its own magicule energy.

But that's not what surprised Issei.

What surprised Issei was the smell that the creature had. Issei's sense of smell can never go wrong in smelling something, and the smell of this creature is a smell that Issei is very familiar with.

The Titan is Tero, Issei's best friend who should have died millions of years ago.

"TERO!" Issei subconsciously shouted at the titan.

The titan retaliated with a world-shaking roar. The titan landed and after the dust was removed, Issei could see the titan clearly.

Tero's body shape was more or less the same as Issei remembered, only that his size was now much bigger, Tero's current size could even be compared to a mountain. The striking difference Issei saw was in Tero's skin, Tero now had brown scales that looked like dragon scales.

Issei doesn't care about any changes that happen to Tero as long as it doesn't have a negative impact, what Issei cares about now is that his best friend is still alive. Issei thoughtlessly flew up and aligned himself with Tero's head.

Seeing Issei approaching, Tero immediately rubbed Issei with his giant pointed mouth.

"Hey, you're too big now buddy, so we can't do this anymore," Issei said while laughing at Tero's antics.

Hearing Issei's words, suddenly Tero's body started to glow. Issei had to squint his eyes from the glare, but he still saw clearly as Tero's gigantic body began to shrink to the size Issei used to remember.

After the light started to fade, Issei could feel something approaching at high speed. Issei didn't dodge or make any defenses, because he knew what was approaching him.

A moment later, Tero who had shrunk down hit Issei at high speed. The collision caused them to be dragged to the ground several meters from their starting position.

Of course Issei was fine, the collision didn't mean anything to him, instead he laughed at his best friend's behavior. Issei rubbed Tero's head while Tero stroked his body at Issei.

"Sorry to leave you Tero. I thought I would never see you again," said Issei while rubbing Tero's head.

After looking closely, Issei could now sense that the magicule energy similar to his own was coming from Tero. But the question now is how? Issei doesn't remember Tero having this energy before, even Tero can be compared to other animals.

Then something caught Issei's attention.

"This…"

Tero's skin was now covered in hard dragon scales, after examining Tero's dragon scales more closely, Issei widened his eyes when he remembered something.

In the past Tero had died from being attacked by another dinosaur causing him to lose a lot of blood and part of his limbs. To save his best friend, Issei used his own flesh and blood to save Tero, he channeled part of his body into Tero's dying body.

After recalling the events, Issei came to an understanding of what happened to Tero right now.

"I see… so this is the theory of evolution that brother is talking about," he muttered.

Veldanava once said that the theory of evolution had existed for a long time even without his brother's intervention.

According to Veldanava, the theory of evolution can occur due to two factors, namely internal factors and external factors. Internal factors occur on the individual's own efforts while external factors are those who get help from outside, be it from other individuals or from supernatural objects that can increase strength.

An example of external factors is what is happening to Tero today. With Issei's flesh and blood becoming part of Tero's body, Tero becomes a magical beast and evolves into a dragon.

As a result of the evolution experienced by Tero, he was able to survive for a very long time and managed to escape the apocalypse that caused the dinosaurs to become extinct. The evolution also made a huge change in Tero's body and allowed him to use magic.

Issei sighed when he thought that this way could keep them together longer. If he had known there was a way like this earlier, then he would never have left his best friend.

"Sorry buddy, for leaving you. I promise not to leave you again," Issei said while stroking Tero, Tero snored lightly in return.

And with that, even though they had separated, in the end the two friends were reunited.

Many years have passed since that meeting, Issei was standing in front of a planet that was almost half the size of Earth. He had tried to detect if there was life on this planet and he couldn't find any life, which made this place suitable for his training ground.

Tero was not with him this time, his best friend had wandered somewhere between this vast space. Issei is not worried about Tero getting lost, since Tero has become a magical beast and evolved into a dragon, Issei can detect wherever Tero is just like he detects the whereabouts of his brother.

Issei refocused himself on the planet in front of him, the purpose of his training this time was to try out the skills he had designed all these years, those skills had been perfected recently and Issei wanted to do a trial to see the results.

Issei reached out his hand and pointed it at the planet, he then strengthened his focus. Since this was his first attempt he had to be careful not to make any mistakes.

"[Black Hole]," Issei muttered.

Right after that, a dense black hole-shaped energy pool formed within the planet's core. The black hole then sucks whatever is around it with a very strong suction force, before long the surface of the planet crumbles like paper and is sucked into the black hole.

That intense pulling force also reached where Issei was standing, but Issei wasn't affected by the tug at all.

Several asteroids scattered near the planet were sucked in and disappeared into the black hole, even a very large satellite was also attracted and disappeared like the previous asteroids.

Issei then clenched his fists and the result was that the black hole shrank and disappeared as if it never existed. But then from where the black hole disappeared, a tremendous shockwave occurred and blew everything nearby. Even a small planet that was very far from Issei's current location was destroyed and scattered due to the very strong vibration effect.

Issei looked at his handiwork with great satisfaction, he nodded and smiled at the success of the skill he had made all these years.

This [Black Hole] skill created by Issei is one of the Ultimate Void Skills, by combining thousands of elements in this universe and using the Void attribute as a basis, Issei is able to create one of the most dangerous celestial bodies in this universe.

But there is one problem.

"Must be careful to use it in the future," Issei muttered while looking at his clenched hands.

Issei hasn't even used the maximum power of this skill but the damage done is very severe. That's why Issei put this skill into the Ultimate level, which means the level of damage caused by the skill is very large.

"That's a good skill, Velmeer," said a voice from behind him.

Issei turned his head and saw Veldanava coming to visit him, "Hi, brother. Are you awake?"

"Yeah, I want to go for a walk a bit," Veldanava said while standing beside Issei, "It looks like you've just been training."

"Yeah, I just tried the skill I just made."

"I can see that the skill is very powerful," Veldanava said while looking around him.

"I guess I have to be careful using it," said Issei stretching his body, "By the way, what are you doing here, brother?"

"Ah, about that… I'll begin it."

Issei's body immediately froze when he heard Veldanava's words, he then slowly turned his head while widening his eyes.

"Serious?" he asked.

Veldanava nodded in response with a smile.

"Yes, I will begin the Age of Life."

Time began to flow.

Thanks for reading!

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Next Update: The Orange Flash