Cycle-Seer Sunna

When Cycle-Seer Sunna enters the battlefield,
you may exile any number of creature cards
from your graveyard. Then, put a 0/0 gold
Skeleton Beast token with lifelink, trample and
vigilance on to the battlefield with X +1/+1
counters on it, where X is the number of
cards you exiled from your graveyard this turn.
Whenever a creature you control dies, proliferate.