Set After heroes of Olympus, during half blood prince, Percy Jackson and some of his friends must go to Hogwarts to help Harry Potter against Voldemort in the war. Through their many hardships the two completely different groups have to work together despite their differences to win this war. Will they fight, or unite? Disclaimer; I do own characters they are the work of JK Rowling and Rick Riordan There will be spelling and grammer mistakes but I can't be bothered to fix it.