Rab, Elder Sage

Whenever Rab, Sage Elder deals combat damage to a player put a +1/+1 counter on it. Whenever you cast an instant or sorcery, Rab, Sage Elder gains lifelink until end of turn. Whenever you activate an ability of another creature you control Rab, Sage Elder can’t be blocked this turn. Pearly Gates-{3}{t}, Untap target creature