Voice of the Blessed
From Innistrad: Crimson Vow set
Voice of the Blessed
Creature — Spirit Cleric
2/2
Whenever you gain life, put a +1/+1 counter on this creature.
As long as this creature has four or more +1/+1 counters on it, it has flying and vigilance.
As long as this creature has ten or more +1/+1 counters on it, it has indestructible.