Fallen Sister of Innistrad

Flying, Lifelink
Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control
with a +1/+1 counter on it.)
{2}{w/b}{w/b}: Remove a +1/+1 Counter from Fallen Sister to exile Target Non-Demon
Creature.