Jiriyah had gone to the Hokage and asked to join the search party for Riku. He also asked to see the scroll of Forbidden Jutsu, but was denied access. Later that night, he snuck into the Mansion and found the scroll anyway and began studying. The techniques he found were amazing, but all had consequences. He learned a few and hoped he would never have to use them. A useful Jutsu used by the once, horrible Orchimaru, was useful with the cost of just chakra. Jiriyah learned how to summon the resurrected snake known as Manda. His chakra level was not nearly high enough, but he began training intensely every day. He would save Riku no matter what the cost.
...Elsewhere... Two figures meet in darkness...
"When will the Nine Tails be ready?"
"Soon... The Leaf Village will soon fall to us."
"And what of the boy. Kakashi has him. Is that not a bad situation."
"Yes. But Kakashi will be dealt with soon enough. He is running out of time."
Two Years Later
Jiriyah woke to the sound of birds chirping. He fell asleep in the forest again. He had given up on the snake summoning Jutsu and instead increased his time with the byakugan to 30 minutes. He also began forming larger Rasengan to battle the strange man from earlier.
Iruka hadn't returned with Sakura and Sai yet, and Natsu had been staying at home. On this day however, war would break out. Two ninja from the mist walked through the gate. Both carried massive swords. They were from the newly formed Swordsman of the Mist. One had white hair and pale skin with a set of blue eyes. The other was darker complected with green hair and an eye patch.
Their attack started quickly. A woman went to greet them and was cut down by the white haired man. Jiriyah heard the screams and explosions of Jutsu coming from the village direction. He quickly ran to the gate and saw his mother fighting off three water clones. She had her byakugan surfaced and she was cut on the arm.
"No! Eat this!" Jiriyah raised his hand and aimed towards the clones, "Wind Style: RasenCannon!"
A small sphere launched into one clone, causing it to disappear. Hinata jumped to Jiriyah and got in front of him.
"Go Jiriyah! There has been a sighting of Riku on the Hokage Cliff. I can handle this. Kiba and Shino are on their way. Go!"
Jiriyah reluctantly ran towards the cliff and saw Riku looking down at him. When he reached the top, Riku was looking at him and the strange man was behind him.
"What's going on down their Jiriyah? Who is attacking?" Riku asked as he hugged his old friend.
"Mist village assassins. Where have you been Riku? And why are you with him?"
"This is the legendary Kakashi. He wanted to train me to master his Justu and be prepared for the return of the Jinchuriki. They beasts have all been sealed into new people who have formed a group to start war with the villages. I hope you have gotten stronger Jiriyah. The fight should be soon."
Jiriyah looked stunned. His father had been the Nine Tales Jinchuriki when he was alive. He couldn't believe that they would need to fight all of the tailed beasts.
Suddenly the two men appeared before the group of three.
"There he is! Hahaha we have been looking for you Kakashi. Now then lets finish Zabuza's work." The green haired one said.
Both men charged Kakashi, who revealed his Mangekyou Sharingan and said one word.
"Kamui."
One man was sucked into a vortex and swallowed whole.
Kakashi covered his eye and fell in pain. Upon opening it, he couldn't see anything! He had finally lost his sight in his Sharingan. The other man continued charging at Kakashi. Riku kicked at the man, but was hit with a punch.
"Stay out of my way kid!" The man yelled.
The man began swinging his sword at Riku who easily dodged.
"Chidori!" Kakashi had punched through the man's cheats with no warning.
He then looked at Riku, breathing heavy.
"Riku... I'm dying right now, but I want to store my mangekyou withing you, so that you will grow into it," Kakashi sent the eye into the genetics of Riku.
"When... When you get that eye... It won't blind you. But don't overuse the power... You will lose your... W...way. I taught you all I could Riku. Now use it," Kakashi slumped over.
Riku wiped the tears from his cheeks and stood. The chaos in the background had continued as more mist ninja showed up. Riku turned and saw his mother and father running towards him. They hugged him as they reached him, but the moment was broke up when suddenly, Sai had a Kunai lodged his his throat. He fell and Riku's eyes grew wide with shock. He looked to who threw the Kunai and saw Natsu standing there.
"Wha... What? Why Natsu?" Riku yelled.
"I'm tired of being the weakest. Well I was tired. Then I found the notes left by a certain Orochimaru. I feel great after I began using his Jutsu. Hahahahah I feel great!" Natsu had a twisted smile on his face.
"You bastard!" Riku yelled.
"That Kunai should have hit you... Oh well, I'll finish it! After I found Orochimaru's scrolls I knew I would be stronger. I hid them from my mom and dad. But they just wouldn't keep out. They both were my first... Toys," Natsu laughed.
Riku looked down at his father and closed his eyes. Upon opening them, his eyes had altered. There was a shuriken shape on his red iris, and it was coupled with a series of diagonal lines that formed a triangle.
"Hmmm the Mangekyou Sharingan huh? Not bad. But I'll one up you," Natsu had small black marks covering his arms and face.
Riku stared at Natsu and felt a stinging pain in his eye as blood rolled down his cheek.
" Kuro no ShÅmei," he mumbled.
Black lighting bolts flew at Natsu and as he went to dodge, they followed and nailed him in his leg. He felt them hit his leg and then he felt the horror of the Jutsu. His leg went numb and he fell. His whole body ached, and he couldn't move.
"Now then... Amaterasu!"
Black flames traveled towards Natsu, who tried to stand up, only to fall down.
Suddenly, a snake flew out of the ground and swallowed Natsu, then went down the hole and traveled away.
Riku felt his eye sting again and held it.
Sakura was attempting to heal her fallen husband, but she failed. She sat there, holding his corpse and sobbing. Riku wiped the blood and tears from under his eyes and followed the trail of chakra the snake had left. Jiriyah began to follow and Riku held a hand up to him.
"This is my revenge Jiriyah. Please just get stronger and defend the village while I'm gone," he turned and shook Jiriyah's hand," you are my brother. Don't forget that."
Jiriyah knew that he would just be in the way, so he nodded and wiped a tear away.
"Okay brother," he replied.
The next morning, Jiriyah packed a bag and told his mother of his plan to get stronger. He left and arrived at the Cloud village in a few days and stood before the Raikage, who was still furious of his "brother's" death even after 15 years of peace. He begged for the sword of Kisame that was hung above the Raikage's desk. He said yes and to take it far away from his village. Jiriyah felt the sharkskin sword that was used by one of the legendary 7 swordsman. He hung it on his back and began his journey towards the Hidden Snow village. He wanted to learn Jutsu that no one used or knew how to counter. He wanted to protect his village.