THE BEGINNING OF THE END

Percy Jackson, the son of Poseidon gets adopted by the god of the dead, becoming the child of the two strongest gods. He has been living in the underworld ever since. Soon, circumstances make him come out of Hades' lair making him the target of several immortals. He has to now protect his siblings, himself and also become the child of the prophecy!
Powerful Percy with JJK techniques to fit the sequel(a jjk crossover)