Keku, Primordial Darkness

Eminence - At the beginning of your upkeep, as
long as Keku, Primordial Darkness is in the
command zone or on the battlefield, create a 2/1
blue and black nightmare illusion creature token
with fear and skulk.
{2}{u}{b}: If a creature you control would deal
combat damage to a player this turn, exile the top
card of your library and gain 1 life.