The Broken Box, The Hidden Power

He fights in the arena with no name. The crowd has him down as the Nameless Beast, and he has no memory of anything before the fights. Zeus took the name and the memory from him. He is Zeus's son by a woman who was not a goddess. After the hundredth match he goes in with Lyra, who is of divine blood and has turned against the gods. The two of them get hold of the Titans' power, and he uses it to kill Ares. His mother's soul is held in the underworld, so he goes down after it. He recovers his name there, Kael Talos, and cuts the chains Hades keeps strung out of human souls. With Hades finished, he turns and heads for Olympus.