A'zbohia, Caller Of Madness

Hexproof, Lifelink.
This creature costs {1} less for each card in each opponents graveyard. When A'zbohia, Caller Of Madness enters battle, tap up to 8 permanents,
they don't untap in their next untap phase.
Whenever a card an opponent control's is exiled
from anywhere, they lose 1 life, put a +1/+1
counter on this creature and you gain 1 life.