Goku Black (ゴクウブラック Gokū Burakku), also known as Zamasu (ザマス Zamasu), though usually referred to as Black, is an alternate incarnation of Zamasu and a former North Kai and Supreme Kai apprentice serving his former master Gowasu from the unaltered main timeline within Universe 10. He serves as the main antagonist of the "Future" Trunks Saga of Dragon Ball Super.in this story you are goku black close friend Zamasu instead of ridding the world of mortal they help mortals and he has help save earth.