Healer's Hawk

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

Loyal Pegasus

Flying
Loyal Pegasus can't attack or block alone.

Cloudfin Raptor

Flying
Evolve (Whenever a creature you control enters, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)

Lofty Denial

Counter target spell unless its controller pays {1}. If you control a creature with flying, counter that spell unless its controller pays {4} instead.

Aerial Assault

Destroy target tapped creature. You gain 1 life for each creature you control with flying.

Gust of Wind

This spell costs {2} less to cast if you control a creature with flying.
Return target nonland permanent you don't control to its owner's hand.
Draw a card.

Battlefield Raptor

Winged Words

This spell costs {1} less to cast if you control a creature with flying.
Draw two cards.