first and final

One day a young man suddenly goes crazy and gains a lot of talents he has so much greed to kill that he gains talents

speed ability

creating a sword

invisibility

there's no other

With these skills he made many assassinations and one day the demon king army came and the demon king started to fight the killer and killed him and destroyed the whole world after stealing his power

After the world was destroyed, he went to other worlds, did the same there, came to the power to destroy a universe, but was suddenly erased by blue light.