Sphinx of Uthuun

Flying
When Sphinx of Uthuun enters the battlefield, reveal the top five cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard.

Bloodhunter Bat

Flying
When Bloodhunter Bat enters the battlefield, target player loses 2 life and you gain 2 life.

Griffin Protector

Flying
Whenever another creature enters the battlefield under your control, Griffin Protector gets +1/+1 until end of turn.

Ifh-Bíff Efreet

Flying
: Ifh-Bíff Efreet deals 1 damage to each creature with flying and each player. Any player may activate this ability.

Dark Hatchling

Flying
When Dark Hatchling enters the battlefield, destroy target nonblack creature. It can’t be regenerated.

Illusory Angel

Cast this spell only if you’ve cast another spell this turn.
Flying

Preyseizer Dragon

Flying
Devour 2 (As this enters the battlefield, you may sacrifice any number of creatures. This creature enters the battlefield with twice that many +1/+1 counters on it.)
Whenever Preyseizer Dragon attacks, it deals damage to any target equal to the number of +1/+1 counters on Preyseizer Dragon.

Glen Elendra Liege

Flying
Other blue creatures you control get +1/+1.
Other black creatures you control get +1/+1.

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.)

Celestial Ancient

Flying
Whenever you cast an enchantment spell, put a +1/+1 counter on each creature you control.

Krond the Dawn-Clad

Flying, vigilance
Whenever Krond the Dawn-Clad attacks, if it’s enchanted, exile target permanent.

Peregrine Drake

Flying
When Peregrine Drake enters the battlefield, untap up to five lands.

Liliana’s Specter

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

Guard Gomazoa

Defender, flying
Prevent all combat damage that would be dealt to Guard Gomazoa.

Kathari Remnant

Flying
: Regenerate Kathari Remnant.
Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.)

Baleful Strix

Flying, deathtouch
When Baleful Strix enters the battlefield, draw a card.

Cadaver Imp

Flying
When Cadaver Imp enters the battlefield, you may return target creature card from your graveyard to your hand.

Enigma Sphinx

Flying
When Enigma Sphinx is put into your graveyard from the battlefield, put it into your library third from the top.
Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.)

Sigarda, Host of Herons

Flying, hexproof
Spells and abilities your opponents control can’t cause you to sacrifice permanents.

Archwing Dragon

Flying, haste
At the beginning of the end step, return Archwing Dragon to its owner’s hand.

Avacyn, Angel of Hope

Flying, vigilance, indestructible
Other permanents you control have indestructible.

Demonic Taskmaster

Flying
At the beginning of your upkeep, sacrifice a creature other than Demonic Taskmaster.

Gryff Vanguard

Flying
When Gryff Vanguard enters the battlefield, draw a card.

Goldnight Redeemer

Flying
When Goldnight Redeemer enters the battlefield, you gain 2 life for each other creature you control.