Kangee's Lieutenant

Flying
Whenever this creature attacks, attacking creatures with flying get +1/+1 until end of turn.
Encore {5}{W} ({5}{W}, Exile this card from your graveyard: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)

Inspiring Overseer

Flying
When this creature enters, you gain 1 life and draw a card.

Hovermyr

Aven Gagglemaster

Flying
When this creature enters, you gain 2 life for each creature you control with flying.

Gift of the Fae

Target creature gets +2/+1 and gains flying until end of turn. (Then exile this card. You may cast the creature later from exile.)

Faerie Guidemother

Faerie Guidemother // Gift of the Fae

Perilous Snare

Start your engines! (If you have no speed, it starts at 1. It increases once on each of your turns when an opponent loses life. Max speed is 4.)
When this artifact enters, exile target nonland permanent an opponent controls until this artifact leaves the battlefield.
Max speed — {T}: Put a +1/+1 counter on target creature or Vehicle you control. Activate only as a sorcery.

Plains

Mothrider Patrol

Aerial Assault

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

Healer's Hawk

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

Dawnwing Marshal

Flying
{4}{W}: Creatures you control get +1/+1 until end of turn.

Soulcatcher

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

Evolving Wilds

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Rally of Wings

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