Sky Tether

Enchant creature
Enchanted creature has defender and loses flying.

Archon of Justice

Flying
When this creature dies, exile target permanent.

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

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

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

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

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

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

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

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

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.