A Harry Potter/Percy Jackson crossover.

United We Stand.

by: bubble drizzles and Mrs. Nanda Black

Disclaimer: We don't own PJO or HP. Never. No, no.

A/N: Hi! I was at Mrs. Nanda Black's house yesterday and we had this idea for a HP/PJO crossover fic. We wrote the Prologue and Chapter 1 today together [in portuguese] and while she'll be posting the original chapters, I'll be in charge of translating them to English! This is the prologue... hope it isn't THAT bad or too confusing. We wrote it kind of... rushed, heh.

Prologue.

The last thing Harry saw was a green flash, then everything disappeared. Harry was alone, where? He didn't know. He decided to walk around, doing so in complete silence, until he realized: He was in King's Cross, except the station wasn't crowded and full of trains, which made a big difference. Suddenly, the silence was broken by the whimpering noise made by a naked, raw crature that was shuddering under a seat. He knew he should confort it, but it repulsed him.

"You cannot help." He spun around, Albus Dumbledore was walking towards him. "As you might know, this is a part of Voldemort that lived inside you." Hary nodded, perhaps to confirm himself, that this creature could not be saved.

"Professor. . . I'm not dead, am I?" Was Harry's first question. Dumbledore laughed,

"Not yet. Unless you wish to move on. But I fear you have somethings left to do."

Harry looked at him, a glint of doubt in his eyes,

"I've already destroyed most of the horcruxes. I'm just missing Nagini and Voldemort himself."

"I fear this is only the least of the problems, my dear Harry." And there, the boy was fully desperate. The least of their problems? All they had done... had it gone to waste?

"I don't understand, Professor."

"Let me explain, Harry." Dumbledore looked at him with a certain fear, ou maybe worry. "Do you know Greek mythology?"

"A bit." The boy said, uncertain. "But what does this have to do with-"

"Be patient, Harry. There's one thing no one ever told you, I only became aware of this one day before I died. Oh, don't look at me like this, Harry." He said when he saw his student glaring at him, "Then, I only wanted you to focus on one thing: Horcruxes. I didn't want anything distracting you from that job."

"Professor, where are you going with all this?" Harry asked.

"Professor Trelawney made another prophecy." Harry stepped back, her prophecies weren't usually in his favor. "The only difference was that no one imagined, actually no one ever proved their existence until that day."

"What did they prophecy say?"

"The prophecy said,

'Dark Magic and Titan will unite.

In a near future, wizards and demigods together will fight.

And after death, the survivor will seek them.

He will seek the greek.' "

Harry was shocked, after all he was always the survivor. But what was this story of demigods? Half-bloods? Were they who had their blood cut in half? In the name of Merlin, he was going crazy. Weren't the Titans the parents of the gods? Gods didn't even exist... but then how... A thousand questions ran through his mind, mas his thoughts were interrupted by Dumbldore,

"What do you think?" Harry couldn't believe that after another prophecy, Dumbledore was still so calm. "Harry, Trelawney gave me this." He reached in his pockets an brought out an hourglass. "It's magic, Harry, you can go to the future or to the past with it. It's being delivered to you, and I think you know why."

"Do I... do I have to go alone?" He wasn't sure where he had to go, but he was certain he wanted his friends with him.

"Of course not. I think Ron and Hermione worthy of your trust. Harry, do you know wha you have to do?"

"Honestly? I haven't the faintest idea, Professor."

"My dear, is it not clear? You have to travel to the future, find the Greek half-bloods and thus destroy the evil that has united."

"How do I do this? Who is the evil?" Harry asked.

"Harry, I have only one this to say. You know evil, at least part of it, and I fear your fellow Greeks know the other. But to destroy evil, you'll also have to continue to destroy the missing Horcruxes; you have to kill Nagini. I trust you, Harry, I always have. But now it's time to wake up, do not forget what I told you."