Battling The Dark: The Harrowing of Hades Viteaz

17 year old Hades Viteaz comes from a Greek-Romanian family and...why yes, he really is named Hades. Clearly it's shocking to you, but to him it's an everyday burden in which he must bear. Nobody trusts the super intelligent and abnormally built kid who's named after the Greek god of death himself. He's the kid who goes by unnoticed by his peers, but by school officials he's known as the school troublemaker (even though he hadn't done a single bad thing in his life). Why would he do bad things? After all, his last name means "valorous" and "heroic" in Romanian. He has a family reputation to uphold. With two pure of heart fathers, you'd imagine everyone else would think of him as a good kid. Absolutely not.
It doesn't help him much that when he was younger he had an imaginary friend named Hades. One with long white hair and pale skin, scars all over and searing red eyes. He would yell and get inside Hades' head, telling him to do bad things and then punishing him when he wouldn't comply. Then one day it just stopped. That was until a family trip to Athens lead Hades down into a cave to retrieve a sacred pendent of purity. There he found it and changed his destiny just by tying the pendent around his neck, for he had stumbled upon the god of deaths' dark magic. Since then he's been passing out and waking up to discover death and destruction in his path, and every time it's been his fault. It took some time, but when he realized he was slowly turning into Hades his whole demeanor changed. Lashing out at family, the love of his life, and himself. Slowly going insane as the days went by, his transformation changing him inside and out. Now that he was becoming the demon he knew from his childhood, the gods next step was simple and obvious; kill everyone in the city of Athens, Greece...then take over Olympus and the rest of the world, using the poor Viteaz as his vessel. Was it possible for Hades to stop such a horrible attack from happening?