Eldrazi Skyspawner

Devoid (This card has no color.)
Flying
When this creature enters, create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this token: Add {C}."

Winged Words

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

Aerial Assault

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

Soulcatcher

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

Rally of Wings

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

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.

Colorful Feiyi Sparrow

Flying (This creature can't be blocked except by creatures with flying or reach.)

War Screecher

Flying
{5}{W}, {T}: Other creatures you control get +1/+1 until end of turn.

Warden of Evos Isle

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

Loyal Pegasus

Flying
This creature can't attack or block alone.