Chaos' Assassin

Perseus Achilles Jackson was betrayed by campers, Chaos offered him a place as his assassins, he accepts as Piper joins his side, she knew that the new camper was lying. They leave Earth to the Primordial Planet but now they have returned to fight the third brother of Chaos and Order, the one and only Destruction...

DISCLAIMER:
I do not own any of Rick Riordan's character, all of the characters belong to him except for the ones I made up, mild violence involved.