I became the strongest as the devils plaything

From poor slave to king of them all. Watch as William rises in power and turns his enemies into nothing but corpses. William was a slave, his live was terrible and he was barely alive at this point. But then he met a devil that gave him a chance to rise in power. Revenge, riches, power are all things that he can obtain now. But everything has it’s cost, the path for power only leads to a path of sufferment for William. And the devil that gave him the chance to obtain those powers? That devil is just using William as a puppet, like a toy that can be replaced any time. Will William escape from the hand of the devils and God’s that try to control his fate or will he stay forever a puppet of stronger beings. This is a story of a slave fighting against his own fate and trying to crush everything that obstructs his path.