Isperia, Protector of Azorius

Flying, First Strike, Lifelink
Whenever Isperia deals combat damage to a player, put a +1/+1 counter on each creature you control. You gain 1 life.
Whenever you gain life, put a +1/+1 counter on each creature you control.
Whenever a player places a +1/+1 on a creature, draw 4 cards and you gain 1 life.