He was one of the rebellious gladiator-slaves crucified by the Romans for being part of Spartacus' uprising, and in his final moments he cried out to the gods for vengeance. Something heard him, and brought him back from the dead in exchange for his soul. He is Aquila, and he is now the unstoppable instrument of Ammit the Devourer who hungers for the souls of men - and Aquila will keep feeding her until the debt is paid!