Mahamoti Djinn

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.)

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.

Crimson Manticore

Flying
, : Crimson Manticore deals 1 damage to target attacking or blocking creature.

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.

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.)

Tetravus

Flying
Tetravus enters the battlefield 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.

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.

Mahamoti Djinn

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

Fire Drake

Flying
: Fire Drake gets +1/+0 until end of turn. Activate this ability only once each turn.

Bog Imp

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

Nalathni Dragon

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

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.)

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.