Flying
When Abhorrent Overlord enters the battlefield, create a number of 1/1 black Harpy creature tokens with flying equal to your devotion to black. (Each in the mana costs of permanents you control counts toward your devotion to black.)
At the beginning of your upkeep, sacrifice a creature.

Flying
When this creature transforms into Abolisher of Bloodlines, target opponent sacrifices three creatures.

Flying
Whenever Abomination of Gudul deals combat damage to a player, you may draw a card. If you do, discard a card.
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

Enchant creature
Enchanted creature has flying.
Threshold — Enchanted creature has shroud as long as seven or more cards are in your graveyard. (It can't be the target of spells or abilities.)

Tap an untapped Cephalid you control: Tap target permanent.
: Tap all creatures without flying.

Flying
When Abyssal Horror enters the battlefield, target player discards two cards.

Flying, trample
You can't win the game and your opponents can't lose the game.

Flying
Whenever Abyssal Specter deals damage to a player, that player discards a card.

When Abzan Ascendancy enters the battlefield, put a +1/+1 counter on each creature you control.
Whenever a nontoken creature you control dies, create a 1/1 white Spirit creature token with flying.

Outlast (, : Put a +1/+1 counter on this creature. Outlast only as a sorcery.)
Each creature you control with a +1/+1 counter on it has flying.

Flying
When Abzan Skycaptain dies, bolster 2. (Choose a creature with the least toughness among creatures you control and put two +1/+1 counters on it.)

Kicker (You may pay an additional as you cast this spell.)
Flying
If Academy Drake was kicked, it enters the battlefield with two +1/+1 counters on it.

Flying, deathtouch
Megamorph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.)
When Acid-Spewer Dragon is turned face up, put a +1/+1 counter on each other Dragon creature you control.

Flying, vigilance
: When target creature other than Adarkar Valkyrie dies this turn, return that card to the battlefield under your control.

Flying
: Target creature loses flying until end of turn. ( can be paid with one mana from a snow permanent.)

Flying, haste
Whenever you cast an instant or sorcery spell, Wizards you control get +1/+1 until end of turn.

Flying
Landfall — Whenever a land enters the battlefield under your control, you may exile target nonland permanent other than Admonition Angel.
When Admonition Angel leaves the battlefield, return all cards exiled with it to the battlefield under their owners' control.

Flying
: Advanced Hoverguard gains shroud until end of turn. (It can't be the target of spells or abilities.)

Flying
, Discard two cards: Return Advanced Stitchwing from your graveyard to the battlefield tapped.

Flying (This creature can't be blocked except by creatures with flying or reach.)
When Aegis Angel enters the battlefield, another target permanent gains indestructible for as long as you control Aegis Angel. (Effects that say "destroy" don't destroy it. A creature with indestructible can't be destroyed by damage.)