Lord of the Pit

Flying, trample
At the beginning of your upkeep, sacrifice a creature other than Lord of the Pit. If you can’t, Lord of the Pit deals 7 damage to you.

Hypnotic Specter

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

Will-o’-the-Wisp

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, it isn’t. Instead tap it, remove all damage from it, and remove it from combat.)

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.

Dragon Whelp

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.

Mahamoti Djinn

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.)

Hypnotic Specter

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

Phantasmal Forces

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

Will-o’-the-Wisp

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, it isn’t. Instead tap it, remove all damage from it, and remove it from combat.)

Dancing Scimitar

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

Wall of Air

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

Mahamoti Djinn

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

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.