Demon of Death’s Gate

You may pay 6 life and sacrifice three black creatures rather than pay this spell’s mana cost.
Flying, trample

Goldenglow Moth

Flying
Whenever Goldenglow Moth blocks, you may gain 4 life.

Platinum Angel

Flying
You can’t lose the game and your opponents can’t win the game.

Air Servant

Flying
: Tap target creature with flying.

Cloud Crusader

Flying
First strike (This creature deals combat damage before creatures without first strike.)

Augury Owl

Flying
When Augury Owl enters the battlefield, scry 3. (Look at the top three cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

Vengeful Archon

Flying
: Prevent the next X damage that would be dealt to you this turn. If damage is prevented this way, Vengeful Archon deals that much damage to target player or planeswalker.

Cloud Elemental

Flying
Cloud Elemental can block only creatures with flying.

Baneslayer Angel

Flying, first strike, lifelink, protection from Demons and from Dragons

Conundrum Sphinx

Flying
Whenever Conundrum Sphinx attacks, each player chooses a card name. Then each player reveals the top card of their library. If the card a player revealed has the name they chose, that player puts it into their hand. If it doesn’t, that player puts it on the bottom of their library.

Ancient Hellkite

Flying
: Ancient Hellkite deals 1 damage to target creature defending player controls. Activate this ability only if Ancient Hellkite is attacking.

Liliana’s Specter

Flying
When Liliana’s Specter enters the battlefield, each opponent discards a card.

Magister Sphinx

Flying
When Magister Sphinx enters the battlefield, target player’s life total becomes 10.

Extractor Demon

Flying
Whenever another creature leaves the battlefield, you may have target player mill two cards.
Unearth (: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

Furnace Whelp

Flying (This creature can’t be blocked except by creatures with flying or reach.)
: Furnace Whelp gets +1/+0 until end of turn.

Hellkite Charger

Flying, haste
Whenever Hellkite Charger attacks, you may pay . If you do, untap all attacking creatures and after this phase, there is an additional combat phase.

Ryusei, the Falling Star

Flying
When Ryusei, the Falling Star dies, it deals 5 damage to each creature without flying.