Imperial Hellkite

Flying
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)
When Imperial Hellkite is turned face up, you may search your library for a Dragon card, reveal it, put it into your hand, then shuffle.

Havoc Demon

Flying
When Havoc Demon dies, all creatures get -5/-5 until end of turn.

Windborn Muse

Flying
Creatures can’t attack you unless their controller pays for each creature they control that’s attacking you.

Swooping Talon

Flying
: Swooping Talon loses flying until end of turn.
Provoke (Whenever this creature attacks, you may have target creature defending player controls untap and block it if able.)

Aven Warhawk

Amplify 1 (As this creature enters, put a +1/+1 counter on it for each Bird and/or Soldier card you reveal in your hand.)
Flying

Sootfeather Flock

Flying
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

Mistform Seaswift

Flying
: Mistform Seaswift becomes the creature type of your choice until end of turn.
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

Dermoplasm

Flying
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)
When Dermoplasm is turned face up, you may put a creature card with a morph ability from your hand onto the battlefield face up. If you do, return Dermoplasm to its owner’s hand.

Wingbeat Warrior

Flying
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)
When Wingbeat Warrior is turned face up, target creature gains first strike until end of turn.

Celestial Gatekeeper

Flying
When Celestial Gatekeeper dies, exile it, then return up to two target Bird and/or Cleric permanent cards from your graveyard to the battlefield.

Crookclaw Elder

Flying
Tap two untapped Birds you control: Draw a card.
Tap two untapped Wizards you control: Target creature gains flying until end of turn.

Kilnmouth Dragon

Amplify 3 (As this creature enters, put three +1/+1 counters on it for each Dragon card you reveal in your hand.)
Flying
: Kilnmouth Dragon deals damage equal to the number of +1/+1 counters on it to any target.

Mistform Wakecaster

Flying
: Mistform Wakecaster becomes the creature type of your choice until end of turn.
, : Choose a creature type. Each creature you control becomes that type until end of turn.

Exalted Angel

Flying
Whenever Exalted Angel deals damage, you gain that much life.
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

Silent Specter

Flying
Whenever Silent Specter deals combat damage to a player, that player discards two cards.
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

Quicksilver Dragon

Flying
: If target spell has only one target and that target is Quicksilver Dragon, change that spell’s target to another creature.
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

Mistform Dreamer

Flying
: Mistform Dreamer becomes the creature type of your choice until end of turn.

Ascending Aven

Flying
Ascending Aven can block only creatures with flying.
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

Aphetto Vulture

Flying
When Aphetto Vulture dies, you may put target Zombie card from your graveyard on top of your library.