Have

Concordia Pegasus

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

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

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

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

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

Flash
Flying
When this creature enters, if you cast it from your hand, exile all attacking creatures.

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

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

Enchant creature
Enchanted creature has defender and loses flying.

Up to two target creatures each 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.)

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

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

When this creature enters, create a 1/1 white Bird creature token with flying.

Flying
When this creature dies, exile target permanent.

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

Flying
Whenever this creature attacks, other attacking creatures you control with flying get +2/+2 until end of turn.

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