Zyx, Slaughtering Slayer

Double strike, soul harvest 3, lifelink, deathtouch, vigilance, returning (When this creature dies return
it to the battlefield at the beginning of the next end step.)
When Zyx, Slaughtering Slayer enters the battlefield create three Soul tokens with
{t} sacrifice this token: Add {w}{b}
"Kill enough demons and you become one yourself."