Hypnotic Specter

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

Serra Angel

Flying
Vigilance (Attacking doesn’t cause this creature to tap.)

Pegasus Charger

Flying (This creature can’t be blocked except by creatures with flying or reach.)
First strike (This creature deals combat damage before creatures without first strike.)

Entropic Specter

Flying
As Entropic Specter enters, choose an opponent.
Entropic Specter’s power and toughness are each equal to the number of cards in the chosen player’s hand.
Whenever Entropic Specter deals damage to a player, that player discards a card.

Mirozel

Flying
When Mirozel becomes the target of a spell or ability, return Mirozel to its owner’s hand.

Wayward Soul

Flying
: Put Wayward Soul on top of its owner’s library.

Welkin Hawk

Flying
When Welkin Hawk dies, you may search your library for a card named Welkin Hawk, reveal that card, put it into your hand, then shuffle.

Ephemeron

Flying
Discard a card: Return Ephemeron to its owner’s hand.

Thopter Squadron

Flying
Thopter Squadron enters with three +1/+1 counters on it.
, Remove a +1/+1 counter from Thopter Squadron: Create a 1/1 colorless Thopter artifact creature token with flying. Activate only as a sorcery.
, Sacrifice another Thopter: Put a +1/+1 counter on Thopter Squadron. Activate only as a sorcery.

Exalted Dragon

Flying
Exalted Dragon can’t attack unless you sacrifice a land. (This cost is paid as attackers are declared.)

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 no more than twice each turn.

Nightmare

Flying (This creature can’t be blocked except by creatures with flying or reach.)
Nightmare’s power and toughness are each equal to the number of Swamps you control.

Fallen Angel

Flying
Sacrifice a creature: Fallen Angel gets +2/+1 until end of turn.

Cockatrice

Flying
Whenever Cockatrice blocks or becomes blocked by a non-Wall creature, destroy that creature at end of combat.

Bog Imp

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

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.)