Keyword: Flying

Defender, flying (This creature can’t attack, and it can block creatures with flying.)

Flying
At the beginning of your upkeep, Serendib Efreet deals 1 damage to you.

Flying (This creature can’t be blocked except by creatures with flying or reach.)
: Regenerate Will-o’-the-Wisp. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

Flying
: Add one mana of any color.

Flying

Defender, flying (This creature can’t attack, and it can block creatures with flying.)

Flying
At the beginning of your upkeep, sacrifice Phantasmal Forces unless you pay .

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.)

Flying
: Dragon Whelp gets +1/+0 until end of turn. If this ability has been activated four or more times this turn, sacrifice Dragon Whelp at the beginning of the next end step.

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

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

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

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

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

Flying

Flying

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.

Flying

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

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

Defender (This creature can’t attack.)
Flying

Flying

Flying
Tetravus enters with three +1/+1 counters on it.
At the beginning of your upkeep, you may remove any number of +1/+1 counters from Tetravus. If you do, create that many 1/1 colorless Tetravite artifact creature tokens. They each have flying and “This creature can’t be enchanted.”
At the beginning of your upkeep, you may exile any number of tokens created with Tetravus. If you do, put that many +1/+1 counters on Tetravus.

Flying
Clockwork Avian enters with four +1/+0 counters on it.
At end of combat, if Clockwork Avian attacked or blocked this combat, remove a +1/+0 counter from it.
, : Put up to X +1/+0 counters on Clockwork Avian. This ability can’t cause the total number of +1/+0 counters on Clockwork Avian to be greater than four. Activate only during your upkeep.