Avatar of Will

If an opponent has no cards in hand, this spell costs less to cast.
Flying

Windscouter

Flying
When Windscouter attacks or blocks, return it to its owner’s hand at end of combat. (Return it only if it’s on the battlefield.)

Spiketail Drake

Flying
Sacrifice Spiketail Drake: Counter target spell unless its controller pays .

Copper-Leaf Angel

Flying
, Sacrifice X lands: Put X +1/+1 counters on Copper-Leaf Angel.

Ribbon Snake

Flying
: Ribbon Snake loses flying until end of turn. Any player may activate this ability.

Avatar of Fury

If an opponent controls seven or more lands, this spell costs less to cast.
Flying
: Avatar of Fury gets +1/+0 until end of turn.

Avatar of Hope

If you have 3 or less life, this spell costs less to cast.
Flying
Avatar of Hope can block any number of creatures.

Stormwatch Eagle

Flying
Sacrifice a land: Return Stormwatch Eagle to its owner’s hand.

Jeweled Spirit

Flying
Sacrifice two lands: Jeweled Spirit gains protection from artifacts or from the color of your choice until end of turn.

Pit Raptor

Flying, first strike
At the beginning of your upkeep, sacrifice Pit Raptor unless you pay .

Ascendant Evincar

Flying (This creature can’t be blocked except by creatures with flying or reach.)
Other black creatures get +1/+1.
Nonblack creatures get -1/-1.

Avatar of Hope

If you have 3 or less life, this spell costs less to cast.
Flying
Avatar of Hope can block any number of creatures.

Cloudskate

Flying
Fading 3 (This creature enters with three fade counters on it. At the beginning of your upkeep, remove a fade counter from it. If you can’t, sacrifice it.)

Defiant Falcon

Flying
, : Search your library for a Rebel permanent card with mana value 3 or less, put it onto the battlefield, then shuffle.

Blinding Angel

Flying (This creature can’t be blocked except by creatures with flying or reach.)
Whenever Blinding Angel deals combat damage to a player, that player skips their next combat phase.

Ascendant Evincar

Flying (This creature can’t be blocked except by creatures with flying or reach.)
Other black creatures get +1/+1.
Nonblack creatures get -1/-1.

Battlefield Percher

Flying
Battlefield Percher can block only creatures with flying.
: Battlefield Percher gets +1/+1 until end of turn.