Owl Familiar

Flying
When Owl Familiar enters, draw a card, then discard a card.

Lifecreed Duo

Flying
Whenever another creature you control enters, you gain 1 life.

Flying
Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Flying
Whenever a creature with flying dies, put a +1/+1 counter on Soulcatcher.

Flying
Whenever another nontoken Bird you control enters, create a 1/1 blue Fish creature token.