Take the crown, I want to be a king

Yuan Go, a university student suffering from a terminal illness was caught up in an incident and obtained a supernatural system that could cure him, but only after he defeats Nine Kings with powerful abilities. He accepted the task and later found that the system had given him a skill called [Domination] : An enemy defeated by his own hands, must unconditionally obey his command once! Follow Yuan Go as he defeats powerful existences and become a king on his own rights.