Warden of Evos Isle

Flying
Creature spells with flying you cast cost {1} less to cast.

Aerial Assault

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

Tranquil Cove

Tranquil Cove enters tapped.
When Tranquil Cove enters, you gain 1 life.
{T}: Add {W} or {U}.

Healer's Hawk

Rally of Wings

Untap all creatures you control. Creatures you control with flying get +2/+2 until end of turn.

Stormtide Leviathan

Islandwalk (This creature can't be blocked as long as defending player controls an Island.)
All lands are Islands in addition to their other types.
Creatures without flying or islandwalk can't attack.

Plains

Thunderclap Wyvern

Flash (You may cast this spell any time you could cast an instant.)
Flying
Other creatures you control with flying get +1/+1.

Squadron Hawk

Flying
When Squadron Hawk enters, you may search your library for up to three cards named Squadron Hawk, reveal them, put them into your hand, then shuffle.

Empyrean Eagle

Flying
Other creatures you control with flying get +1/+1.

Island

Winged Words

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