From the future trunks arc in dbs, evil, wants to kill all mortals with a plan called "project 0 mortals" very strong and is basically immortal as he gets stronger with every attack, is actually zamasu who used the super dragon balls to switch bodies with goku and can also make a scythe out of energy and has a form called super saiyan rosè that has the same power as super saiyan blue, and once he unlocks super saiyan rosè evolved (mastered) its even stronger