This chapter will be longer, because I want to apologize for my mistakes in teh chapters, so, have fun with this one.

"What are you doing here Gaea?" Growled the cyborg. The primordial goddess smiled at him.

"What do you think?" The smile was genuine but Percy didn't see that.

"Combat mode active, full strength. Aiming assistant active." Said Percy with a serious tone. He then turned his head slightly to the hunt, keeping Gaea in his visual field.

"Go. Run. I will take care of her. How are you here Gaea? The last time, it took you three entire millennia to awake." Said coldly the son of Poseidon. The Earth simply smiled.

"I am the earth. Even if I am weak, you can't kill me. And I am always conscious. I was simply waiting for the right time. But it seemed you ruined that plan. And you seem interesting."

"Why? And why did you attack the Olympians? Hmm? You clearly not are on my side." Said the demigod. The face of the primordial hardened.

"They banished my son in Tartarus. It was for revenge. They are cruel to send their own father there. Only for power." Percy frowned.

"You do know this father ate his own children. And tried to kill me eventually. And tried to destroy the world." Gaea stumbled back, like she was surprised.

"Re-really? He never told me that." Percy rolled his eyes.

"Of course he wouldn't. Momma's boy was too clever for that and he wouldn't his mom to be disappointed. After all, he did dragged his brothers in a huge war, using mortals, monsters, demigods and threatening the west civilization." Stated the son of Poseidon with anger.

'Oh. I didn't know. I' m sorry. I-." She seemed overwhelmed by the news. Percy relaxed a bit and holstered his gun, but kept Anaklusmos. Better be safe than sorry. He put an arm around her shoulder and tried to comfort her. She cried a bit before looking at him.

"You used the past tense. Why?" Sobbed the shattered primordial. Percy then look uneasy. He was about to say to a primordial that he made her son fade and claimed his domain.

"Well, Kronos tried to have revenge on me. We fought and I, well, I used his scythe to kill him." Gaea's eyes widened.

"You are the Lord of Time?" Percy nodded and Artemis intervened.

"Zeus didn't look quite pleased with that." Gaea chuckled weakly.

"I bet. But I came here to help you. I need to repent for my mistake. I know how you can learn what you need. You need to become deadly. Where can you learn it? With which god?" Asked Gaea. And Percy's eyes widened.

"Thanatos! Of course! Thank you Lady Gaea! Well, now I have to go to the underworld. Great. Maybe I should take Annabeth to exchange her soul for Nico's." Muttered Percy. Thalia laughed.

"Maybe! But try not to. Athena wouldn't be okay with it." Joked the daughter of Zeus.

Percy laughed before turning serious. He took a deep breath and whistled loudly. A second later, Mrs. O'Leary jumped out of the shadows and sat in front of the cyborg, her tongue out.

"Hey girl! How are you? I need a ride, you think you could handle it?" The hellhound barked happily and Percy climbed on her back and he disappeared in the shadows. Leaving a stunned primordial goddess and hunt.

"Do… Do he really have a pet hellhound?" Asked Gaea. Thalia nodded.

"That, and a personal black Pegasus." Added Artemis.

"He is unbelievable." Stated Gaea as she looked at the shadow where Percy disappeared. Artemis nodded at this statement.

Percy, after the familiar rush of adrenaline that comes with the shadow travel, jumped on the cold floor of the underworld, in front of the castle of the god of wealth. He heard a sound of wings above him and raised his head to see one of the three furies.

"Tisiphone right? Yeah that's it. Well Tisiphone. I am here to ask something to Hades. Can you announce me please?" Politely asked the cyborg, trying a nice approach before forcing her. But the fury smiled, making Percy know that he would have to use strength.

"I think I prefer to kill you." Said the fury, but before she could do anything, Percy took out his gun and fired in her wing, making her drop from the sky and crash in front of him. He looked at her coldly.

"You will announce me to your master, if I ask you to, it is only because I respect him. I could simply kill you and barge in his throne room unannounced. I already did it and I can do it again. Now announce me." His green eyes seemed to have silver glitters in it. Tisiphone looked away for a second before nodding. Percy relaxed a bit.

"Thank you Tisiphone." He walked inside the castle confidently, crossing a few ghost on his way until he entered the Throne room silently. There was Hades in a black tuxedo with, by his side, his queen who looked at him with concealed hatred. The cyborg bowed his head a bit.

"Uncle Hades, Lady Persephone." Hades nodded to greet him while Persephone only glared at him.

"I came here for an information. I am currently looking for a god, Thanatos to be precise." Said Percy. Hades seemed surprised for a second before looking interested.

"Why would you need him Hero of the Greeks?" Asked the god of the underworld.

"As you might know, I am now the Assassin of the Hunt. The problem is that I am a warrior, not an assassin, so I need a formation, and who better than the god of death to teach me assassination?" Hades nodded and seemed in deep thought for a moment before looking back at the Champion of Hestia with a serious face.

"Thanatos will be here in a moment. How are you holding your prosthesis? It might not seem so, but you are my favorite demigod after my daughter of course." Percy smiled a bit at this and answered him honestly. They began to discuss for a while until a winged god appeared in the room, an Ipad in his hand.

"So you wish to learn demigod. I must warn you that it won't be easy, nor safe. Are you sure? A simple demigod can't handle my training." Said the god of death toneless. Percy looked at him. He could see the god didn't take him seriously, so he decided to make a show. He make his scythe appeared on his back, he took it and slammed the blunt edge on the floor. He entered battle mode and he felt his Spartan blood arise.

"But you aren't talking to a simple demigod. You are talking to the Lord of Time. And last true Spartan. I assure you I can handle your training God of Death." Said strongly Percy. The god looked at the scythe with interest.

"How did you acquire the weapon demigod? I would gladly try it." But Percy chuckled.

"I killed Kronos in a fight and made him fade. But could we begin? I would want to go back to the hunt as soon as possible." Thanatos nodded and together they flashed away, leaving for three months of intense training.

The hunt was running in the wild, tracking a group of monsters by the east coast. It has been nearly three months since Percy leaved for the underworld. Hades had assure them that he was alive and training. But the solstice was approaching and Poseidon would want to see his son. It was in a few weeks to be exact.

She was pulled out of her thoughts by her lieutenant warning her that she located the monsters. And that it was dangerous. Artemis readied herself and walked stealthily to the location of the monsters. There, she saw a group of the most fearsome monsters of the mythology. There was the minotaur, the Nemean Lion, two Drakons, a pack of Hellhounds, and an hydra.

"Great. How can we do that." Cursed the goddess. She knew that even if her huntresses were strong, they weren't enough to handle this group. Suddenly, she felt in her head a strange sensation. Like if something was back at his place in her hunt, but she didn't feel the lack of this something. She turned around and there was a man, standing tall behind her, his hooded cloak hiding his face, a frightening scythe on his back and a spatha. He took his spatha and looked at it, it shimmered and was replaced by a wicked looking sniper rifle.

It was black, the butt, handle, trigger and silencer and part of the scope was silver. The fighter turned to Artemis and talked.

"Milady, your assassin is ready for duty. I will take care of the Nemean Lion and the Hydra." And Artemis realized, it was Percy, his stance was more battle ready, he seemed to be on alert, he looked more deadly, with his face concealed. Artemis nodded.

Percy stepped back and blended in the shadows before running in absolute silence. He laid down and readied his rifle. And whispered.

"Aiming assistant, sniper mode, booting. Ready." He then listened to his heartbeat. In his mind rang the voice of Artemis.

On your call Percy. And the demigod smirked.

*Boom-boom boom-boom boom-BANG!* He fired and killed the minotaur. Instantly, a rain of silver arrows fell on the group and the Nemean Lion roared.

*BANG!* Another shot, directly in the mouth of the monster, turning it into golden dust. He turned his weapon in a spatha and put it on his back before uncapping Riptide and ran to the battlefield at full speed. In a few minutes, he ran the mile that separated him and the hunt. When he arrived, he ignited his sword and cut one of his five head, cauterizing it. He avoided a mouth that snapped at him and cut it quickly. In a few minutes, he killed single handedly the monster and turned to the rest of the battlefield. Only was the Drakons left. The hunt was currently firing arrows to the eyes, killing one. Percy took his gun and fired a round in the second ones mouth.

Once they made sure the battlefield was clear, the hunters turned to Percy and readied their bows. Phoebe spoke.

"Who are you male? And how did you sneak on us." This made Percy chuckle.

"Seriously! I train for three months and you don't accept me anymore? I am hurt!" Mocked Percy, putting his hand on his chest. Thalia gasped.

"Percy? That's you?!" Percy nodded ad Thalia jumped in his arms. She removed his hood and gasped again. His eyes had turned silver and his faced looked without any default. It was like looking at Percy with the characteristics of Thanatos, a flawless face.

"You changed a lot! What happened to you?" Percy gave her a lopsided grin as he changed his cloak in a coat.

"Later, let's set up the camp first. I will speak later." He walked to a tree nearby and climbed in it to take his backpack. He jumped down the tree and looked at the place. He walked to the center of the clearing there was in and kneeled. He concentrated and in a small orange flash and burst of flame, a fireplace appeared.

When he saw everyone with wide eyes, he shrugged.

"I am the champion of Hestia, goddess of the hearth, home and family. And the campfire is your hearth and home. So I can make it appear." Artemis smiled at that, realizing that his presence was going to ease a large number of tasks.

He turned to his backpack and took out a rolled up tent. He unwrapped it and began to set it up. Soon, a black and silver tent was standing, on the side and front flap was a symbol.

It was a sniper rifle crossed with a xyphos at the front of a creasing moon. And the hunt realized there was the same symbol on the back of his cloak and on the front pocket of his coat.

In a few minutes, the camp was installed. Percy walked to the campfire and looked at the girls who were looking at him, eager to hear about his training. He sat down and began his tell.

"Well, I had to train hard, really hard, there is a few times I thought I was going to die. The day began with running and muscle-building exercise. Well, it was supposed to. It changed when Thanatos saw my enhancements. Then, it was stealth training. I had to escape Death himself, and believe me, he is one Hades of a tracker. Then, I had weapon training, I had to learn how to properly use my scythe. And let's just say Thanatos is sterner than Artemis when it comes to training. He called souls every day to help me perfecting my swordsmanship. He gave me a few gifts. But before that, I had the hardest training ever. He made me train so I only need two hours of sleep, and even be able to be ready when I am in Morpheus' arms." The hunters cringed a bit when they heard that. Even them knew that two hours of sleep was not much.

Then Phoebe, being the daughter of Ares she was, ask for a list of his weapons. Percy smirked. He began his list, taking them out and putting them against a log next to him each time.

"First, I have Anaklusmos. Of course. Then, I have Backbiter, my scythe." When he took out the weapon, everyone shuddered, the memory of the Titan coming back in their minds.

"I have Nightbiter, my spatha. It can turn on my will in a sniper rifle firing silver bullets. I have my hunting knives, my handgun, and hidden wrist blades." Every single girl had wide eyes when they saw the number of weapons.

"I have also a set of throwing knives, lock picks, a range of poisons and drugs. And… I think that is all." Finished Percy. He then heard the familiar voice of Gaea ringing behind him.

"Well, you became a real walking armory. So I guess my advice was helpful." Smiled Gaea. Percy smiled back at her.

I didn't write the training, simply because I don't know what to write for it and I now it can be a bit boring sometimes.

Thanks to Arkyz, Lycaon1096 and Thundercade for their reviews for the previous chapters.