"I am the bone of my sword."

When Percy read that line, everyone suddenly had a chill run down their spine.

"What does that mean?" Annabeth asked. No one had an answer but they could tell that it was important.

Percy felt like he was dipped into powerful acid as he jumped into the River Styx.

"Steel is my body and fire is my blood."

Percy saw images that he has never seen before flash through his mind. Dreams that didn't go through and two loves thought lost.

"This is when I'm in the River Styx," Percy said eyes wide. "But I didn't see anything like what it's talking about... No memories, no dreams."

Aphrodite squealed. "Two loves? I wonder who that could be?"

"Hopefully no one important," Annabeth muttered.

"I want to know what the Hades is with the lines though," Thalia stated. "I am the bone of my sword? Steel is my body and fire is my blood? It sounds like something a child of Hephaestus would say..."

Leo nodded in agreement

"I have created over a thousand blades."

"Saber," Percy whispered unconsciously. "Rin."

Neon green circuits then began spreading throughout his body.

"Unknown to Death, nor known to Life."

"No one is unknown to death," Nico stated. Getting even more confused, it was the same with everyone else. "But the other part confuses me... Unknown to Death, nor known to Life... What does that mean?"

"It sounds like a poem," Athena said thoughtfully. "But the meaning could be something far deeper."

Percy frowned in thought.

Percy's sea-green eyes gained streaks of steel grey and his hair gained white tips. He also felt himself begin to stop flowing with the river's current as if he was anchored to land.

"Have withstood pain to create many weapons."

In Percy's mind, he could see a world made of infinite swords and other bladed weapons. With a man on a hill in the middle of it all.

"Yet those hands will never hold anything."

When Percy reached the man, the man held out his hand and Percy held out his own. An unknown message between them was sent and a bright light emanated from them as three figures were seen by them.

"So as I pray-"

"Get up Master/Seaweed Brain/Baka," the three figures ordered before they merged into one. "Come on. We don't have all day, Seaweed Brain. You need to fight Kronos."

"You have a world in your head?" Leo asked Percy with wide eyes. "That is epic! I wonder if you can summon it in the real world."

"Master? Baka?" Annabeth muttered to herself. "Only a servant would call someone master. And 'Baka' is Japanese for 'idiot'... Who are these people? And how am I connected to them?"

Jason looked thoughtful, "Maybe it's reincarnation or something? I mean, it's the only thing that makes sense."

"But no one has been able to remember their past lives," Zeus stated. "And no one ever will."

Annabeth rolled her eyes. If there was one person she knew would be able to remember their past life, it would be Percy Jackson.

"Unlimited Blade Works."

Percy jumped out of the River Styx his eyes like a whirlpool of steel grey and sea green and his hair swaying to an invisible wind. His skin was red and looked as if he had a serious sunburn, but it was slowly returning back to its normal beach tan.

"That's the title of the story," Poseidon stated. "Why would the title be a part of the story itself?"

"It's the name of the world that is in the story's version of Perseus, shell head," Athena replied with a roll of her eyes. "What I want to know is how and why your son's appearance changed."

"I'm gonna go with Jason here," Annabeth said. "Reincarnation happened, and somehow, the River awakened his soul which then released his past life and influenced Percy's appearance and most likely his personality as well."

The rest of the seven nodded in agreement.

"Percy?" Nico di Angelo hesitantly asked. "Is that... Is that you?"

Percy didn't answer right away as he looked down at his hands. Clenching and unclenching them repeated as if he was testing something.

"Yeah," Percy replied with a smirk. "It's me."

"You feel... different," Nico stated. "And look different. What happened to you in the River?"

"Memories," Percy replied after a moment. Percy then looked towards the Fields of Asphodel. "We've got company."

"What do you mean?" Nico asked, turning his head in the same direction that Percy was looking. "No one is there."

"Trace... on!" Percy muttered as a bow appeared in his hand.

"That's not gonna work for you Perce," Thalia told him jokingly and somewhat seriously. "You are terrible with a bow."

"This is a different universe Thalia," Percy told her. "So who knows, I might be really good with a bow."

Thalia had to concede there.

"Yes, there is, Neeks. You just don't see them. Your father is coming and with an entire army of skeletal soldiers."

Percy then held his hand up at an obtuse angle, his palm facing upwards, and a spiraled bladed sword appeared in his hand in a burst of red light and surrounded by brief blue wisps.

"How did..." Hephaestus trailed off. 'That sword sounds familiar... Could it be... A spiraled sword... Yes. It can only be Caladbolg.'

"Dude," Leo began. "This other you is awesome!"

"What in the name of my father..." Nico trailed off as he backed up away from Percy in shock.

Percy then placed the arrow on this bow and as he pulled back, it turned into an arrow made of bone. Percy then began pulsing red energy, which then covered the arrow, before the blue wisps returned and began spiraling around him.

"Sorry for doing this to your father and his army, Neeks," Percy apologized, "but this had to be done."

Percy then released the arrow which shot towards the god of the underworld, at such a speed that it looked like a comet, and his army and struck him with the force of a thousand Master Bolts. When it hit, a mushroom cloud, much like the one from an atomic bomb, rose into the air of the Underworld.

"What the Hades!?" Nico shouted, his eyes wide in shock.

This shocked everyone in the room as well.

"The other you," Apollo began.

"Summoned a sword," Hermes continued.

"And it caused an explosion," Athena continued still.

"That was equal to a nuclear warhead?" Artemis finished.

"AWESOME!" Apollo and Hermes shouted, along with Ares and Leo.

The bow then disappeared and Percy smirked.

"Let's go see your father now," Percy stated. He then began walking towards the place and they soon arrived.

"Jackson," Hades almost growled out, his clothes having dried ichor on his reformed body. "You are lucky that I am wounded or I would have you killed!"

"Then who would save Olympus from Kronos who is going to attack soon?" Percy asked his uncle. "I am the oldest child of the Big Three, Hades. So grow up and quit your whining."

"You are definitely a bit different Percy," Piper spoke up. "I mean, it's like you're more ruthless I suppose you could say."

Demeter nodded in agreement.

"I think it makes him sound even better," Aphrodite said, paying a bit more attention to the story.

"To injure Hades like that... Your other self is going to be lucky that dad doesn't obliterate him," Ares said, before getting a wicked grin on his face. "I hope it happens punk."

Zeus was also hoping that his alternate self blasted the son of Poseidon to Tartarus.

Percy turned around so his back was towards his uncle.

"Now if you don't mind," the son of Poseidon began, his eyes hard as steel. "I have a war to win."

Percy then began the long walk out of the Underworld and soon reached the outside.

"I see that you've finally got your memories and powers," a male's voice stated, "Finally the real enter... I mean battle begins."

"You were going to say entertainment," Percy deadpanned to the male. Percy turned around and saw a fifty-year-old man wearing a black suit and a cane in hand, with a white beard and white hair. "I know how you are Zelretch."

The old man just smiled at the demigod in front of him and replied, "Yeah, yeah. So, did you know that you were not the only one I brought to this dimension?"

"WHAT!" everyone shouted in shock.

"How is that even possible?" Athena questioned, going deep in thought. "How can someone go between dimensions? And what does he mean that Perseus Jackson is from another dimension?"

"It could mean his soul," Hades spoke up, a thoughtful expression on his face. "No one has had that power in any Greek or Roman myth. Thus, it could only mean one thing: His soul, his previous life, is from this man's home dimension."

Everyone looked at Hades in shock.

"What?" the god of the Underworld asked. "I'm smart you know. You have to be in order to deal with the spirits of dead geniuses."

Percy immediately brought out Riptide and put it under Zelretch's chin.

"Continue or you'll be missing your head," he remarked coldly.

Zelretch rolled his eyes.

"Yeah, yeah," the old man replied. "Tohsaka-san and the King of Knights are here in this dimension. Along with the King of Heroes. Lancer is as well."

"Anyone else?" Percy asked, Riptide now back in pen form and away from the old man's chin.

"Caster, Assassin, and Rider," Zelretch stated calmly. "And your sister as well, but that won't be for a few more months."

"What about the other Masters?" Percy asked. "Are they here? Or any more Servants?"

Zelretch seemed to think for a moment.

"I'm beginning to dislike this man," Hera stated. "He seems to speak in riddles and withholds information."

"What I want to know is what they mean by 'Master' and 'Servant'," Athena said. "They seem to be important."

"As well as those titles he spoke of," Annabeth mentioned. "Does anyone know who they belong to?"

"King of Heroes sounds familiar..." Zeus muttered under his breath.

"Nope," the old man replied, rubbing his hands together. Percy could see a twinkle in his eyes but decided against asking him another question.

"Can you take me back to Camp Half-Blood?" Percy asked. "Or even New York?"

"Of course I can, Perce," Zelretch replied with a grin.

"Archer," Percy replied. "You may call me Archer."

Zelretch smiled widely.

"It's good to have you back, Archer," the old man commented before Percy disappeared in a burst of mana. "I can't wait to see how your friends and the Olympians react to your power."

"Neither can we," the heroes in the room said in unison.

New York City

"We're being overrun!" a son of Apollo shouted as he and his brothers and sisters were sniping at monsters left and right. "We don't have enough arrows!"

"Well, we need to think of something!" Will Solace one of the 12 Councilors, shouted. "Percy isn't here yet and we can't always rely on him, even if he's our heavy hitter!"

Two roars then shook the bridge they were on and Will Solace looked up and his eyes widened.

"Retreat!" the son of Apollo shouted. "Retreat now!"

It was both the Minotaur and the Nemean Lion. If one wasn't enough, it was two. And Will knew that they couldn't beat the Nemean Lion without losing most of their allies.

'What the hell are we going to do?!' Will desperately thought.

"No, no, no, no," Apollo repeated. "What the Hades are they gonna do? They can't just die!"

Everyone was tense, they all knew that the two monsters were powerful, especially the Nemean Lion. Percy meanwhile had a thoughtful expression on his face before gaining a smirk.

With Percy

Percy appeared atop the Empire State Building. The echoes of monsters, and the smell of death permeating the air. Percy walked the perimeter of the sight-seeing area and narrowed his eyes as he watched everything unfold before his eyes looked to Williamsburg Bridge where his eyes narrowed upon seeing his old friends the Minotaur and the Nemean Lion.

A black bow then materialized in his left hand and a sword in the other. He placed the sword on the bowstring and it turned into a bone arrow.

"Knew it," Percy stated a smirk still on his face.

"It's not like you have a weapon that can pierce the unpierceable," Ares stated. "Only I do."

"Unlimited Blade Works," Percy reminded them. "And I bet I do."

Meanwhile, Athena's eyes widened at the image her mind was building. A person who can summon any blade and be able to change it's shape to an arrow? Now that's a threat to Olympus that she doesn't want around. She discreetly looked at her father who was thinking the same thing.

"Hound of the Red Plains."

"Fly, Hrunting!" Percy shouted before releasing the weapon and it turned into a red bullet that flew straight at the bridge before it collided with the area and vaporized any and all monsters. Including the fearsome Nemean Lion.

Everyone's eyes widened at this. Percy Jackson the son of Poseidon killed the Nemean Lion with a single blow? No one, not even Hercules could do this. A second thought also entered Hephaestus's mind.

'Hrunting?' he thought. 'Could it be that he is able to summon weapons of heroes long past? Caladbolg was owned by Fergus mac Roich and Hrunting was owned by Beowolf. Both of which are ancient heroes... Yes. That must be it. He is able to summon weapons from past heroes.'

The son of Poseidon smirked before he jumped down and joined the fray.

"Who's next?" Percy asked as he finished reading.

"Me," Piper spoke up holding her hand out as Percy handed her the book. "Chapter 2: Archer vs Rider..."