Alveus, Devourer of Souls

Eminence - When a creature you control dies, as
long as Alveus, Devourer of Souls is in the
command zone or on the battlefield, you may pay {p/b}. If you do, create a 3/3 black Horror creature
token.
Deathtouch, Hexproof
Alveus, Devourer of Souls enters the battlefield
with a +1/+1 counter on it for each {c} spent
when you cast him.