undying ooze

undying ooze enters the battlefield tapped. ever undying(whenever this creature dies return it to the battlefield with a -1/-1 counter on it for each time it has died this game. if it where to die as soon as it where to enter the battlefield exile it instead.){g}{t} remove a -1/-1 counter from this creature if there are no -1/-1 counters on this creature instead put a +1/+1 counter on this creature.