Hellkite Igniter

Flying, haste
: Hellkite Igniter gets +X/+0 until end of turn, where X is the number of artifacts you control.

Serum Raker

Flying
When Serum Raker dies, each player discards a card.

Thopter Assembly

Flying
At the beginning of your upkeep, if you control no Thopters other than Thopter Assembly, return Thopter Assembly to its owner’s hand and create five 1/1 colorless Thopter artifact creature tokens with flying.

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.

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.

Owl Familiar

Flying
When Owl Familiar enters the battlefield, draw a card, then discard a card.

Wild Aesthir

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

Osai Vultures

Flying
At the beginning of each end step, if a creature died this turn, put a carrion counter on Osai Vultures.
Remove two carrion counters from Osai Vultures: Osai Vultures gets +1/+1 until end of turn.

Thunder Dragon

Flying
When Thunder Dragon enters the battlefield, it deals 3 damage to each creature without flying.

Shivan Dragon

Flying (This creature can’t be blocked except by creatures with flying or reach.)
: Shivan Dragon gets +1/+0 until end of turn.

Cloud Spirit

Flying
Cloud Spirit can block only creatures with flying.

Junún Efreet

Flying
At the beginning of your upkeep, sacrifice Junún Efreet unless you pay .

Ebon Dragon

Flying
When Ebon Dragon enters the battlefield, you may have target opponent discard a card.

Dread Reaper

Flying
When Dread Reaper enters the battlefield, you lose 5 life.

Phantasmal Forces

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

Foul Spirit

Flying
When Foul Spirit enters the battlefield, sacrifice a land.

Serendib Djinn

Flying
At the beginning of your upkeep, sacrifice a land. If you sacrifice an Island this way, Serendib Djinn deals 3 damage to you.
When you control no lands, sacrifice Serendib Djinn.