Percy has to make a decision that will change his life forever, and not necessarily in a good way. How will the decision effect him? It will change his entire life. It will make and break the futures of others. What can a demigod do?

Harry Potter is used to being the Hero of his world. He and every other wizard believes he is the destined savior of the world. Now that wizard world knows Voldemort is back Harry is going to need protection. Percy Jackson has finally defeated Gaea and saved the world yet again and thinks things will start to calm down. Unfortunately for him, he is that protection. Except he can't do it alone. He is going to need the help of six certain people. Worlds collide in Demigods at Hogwarts. (Guys I suck at summaries. I swear the book is better.)

Everyone lives, and everyone dies. Except for Elwyn Thwaite

''Sometimes being a false son, makes you a true person.'' I am Omega, the son of Chaos, the Commander of Chaos' army. I was given a mission, go to the planet earth, save the Olympians and demigods from Kronos and Geae. Simple, like every other mission I've done. I am going with my army, Alpha, Beta, Delta, Gamma, and Epsilon, the elite team. Yet my soldier's and I have a past on Earth, each one of us a were buried there, in betrayal and anger, and sadness. I like everyone else on my team was given a second chance. A second chance by Chaos. On Earth is my ex-girlfriend, who is probably making out with my step brother. There are my ex-best friends who are most likey going about their happy cheerful life, yet I doubt that. Its been five hundred years hence I lived on that dreadful planet, they must be dead. But I was wrong. One last thing you should probally know about me: My real name is Percy Jackson