Falconer Adept

Whenever Falconer Adept attacks, create a 1/1 white Bird creature token with flying that's tapped and attacking.

Plains

Defender (This creature can't attack.)
Attacking creatures you control get +1/+0.

Flying
When Gale Swooper enters, target creature gains flying until end of turn.

Thriving Heath enters tapped. As it enters, choose a color other than white.
{T}: Add {W} or one mana of the chosen color.

Up to two target creatures each get +2/+2 until end of turn.

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

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

Flying
Whenever Steel-Plume Marshal attacks, other attacking creatures you control with flying get +2/+2 until end of turn.

Target creature gets +2/+2 and gains lifelink until end of turn. (Damage dealt by the creature also causes its controller to gain that much life.)

Exile target creature or planeswalker. Its controller creates a 4/4 white Angel creature token with flying.

Up to two target creatures each get +1/+2 until end of turn. You gain 2 life.

Target creature gets +2/+2 until end of turn. You gain 1 life for each attacking creature you control.

Flash
Flying
When Angel of the Dire Hour enters, if you cast it from your hand, exile all attacking creatures.

{1}{W}, {T}: Tap target creature. Activate only if you control a creature with flying.

Enchant creature
Enchanted creature has defender and loses flying.

Flying
When Archon of Justice dies, exile target permanent.

Flying
Whenever Archon of Redemption or another creature you control with flying enters, you may gain life equal to that creature's power.

Target creature gets +1/+7 until end of turn.