The king's twelve emperors

There exists a king so powerfull, he had killed the gods of 50 universes. Presently he rules over them with an iron fist. Under him serves eleven emperors capable of killing gods. When a new player enters the arena, he is to be tested. Of course as powerfull as the king is he still has enemies and one person could shift the balance of the inter-universe war raging. Millions die every second and the war's end is far, but the eyes on the new player only multiply as he grows stronger.