Mesa Pegasus

Flying; banding (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature’s combat damage, not its controller, among any of the creatures it’s being blocked by or is blocking.)

Bog Imp

Flying (This creature can’t be blocked except by creatures with flying or reach.)

Vampire Bats

Flying (This creature can’t be blocked except by creatures with flying or reach.)
: Vampire Bats gets +1/+0 until end of turn. Activate this ability no more than twice each turn.

Swamp Mosquito

Flying
Whenever Swamp Mosquito attacks and isn’t blocked, defending player gets a poison counter. (A player with ten or more poison counters loses the game.)

Storm Crow

Flying (This creature can’t be blocked except by creatures with flying or reach.)

Wild Aesthir

Flying, first strike
: Wild Aesthir gets +2/+0 until end of turn. Activate this ability only once each turn.

Rogue Skycaptain

Flying
At the beginning of your upkeep, put a wage counter on Rogue Skycaptain. You may pay for each wage counter on it. If you don’t, remove all wage counters from Rogue Skycaptain and an opponent gains control of it.

Storm Crow

Flying (This creature can’t be blocked except by creatures with flying or reach.)

Carrier Pigeons

Flying
When Carrier Pigeons enters the battlefield, draw a card at the beginning of the next turn’s upkeep.

Swamp Mosquito

Flying
Whenever Swamp Mosquito attacks and isn’t blocked, defending player gets a poison counter. (A player with ten or more poison counters loses the game.)

Phantasmal Sphere

Flying
At the beginning of your upkeep, put a +1/+1 counter on Phantasmal Sphere, then sacrifice Phantasmal Sphere unless you pay for each +1/+1 counter on it.
When Phantasmal Sphere leaves the battlefield, target opponent creates an X/X blue Orb creature token with flying, where X is the number of +1/+1 counters on Phantasmal Sphere.

Carrier Pigeons

Flying
When Carrier Pigeons enters the battlefield, draw a card at the beginning of the next turn’s upkeep.

Storm Elemental

Flying
, Exile the top card of your library: Tap target creature with flying.
, Exile the top card of your library: If the exiled card is a snow land, Storm Elemental gets +1/+1 until end of turn.

Ivory Gargoyle

Flying
When Ivory Gargoyle dies, return it to the battlefield under its owner’s control at the beginning of the next end step and you skip your next draw step.
: Exile Ivory Gargoyle.

Wild Aesthir

Flying, first strike
: Wild Aesthir gets +2/+0 until end of turn. Activate this ability only once each turn.

Sengir Vampire

Flying (This creature can’t be blocked except by creatures with flying or reach.)
Whenever a creature dealt damage by Sengir Vampire this turn dies, put a +1/+1 counter on Sengir Vampire.

Hypnotic Specter

Flying
Whenever Hypnotic Specter deals damage to an opponent, that player discards a card at random.