Rainbow Efreet

Flying
: Rainbow Efreet phases out. (While it’s phased out, it’s treated as though it doesn’t exist. It phases in before you untap during your next untap step.)

Firestorm Hellkite

Flying, trample
Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

Waterspout Djinn

Flying
At the beginning of your upkeep, sacrifice Waterspout Djinn unless you return an untapped Island you control to its owner’s hand.

Kyscu Drake

Flying
: Kyscu Drake gets +0/+1 until end of turn. Activate this ability only once each turn.
Sacrifice Kyscu Drake and a creature named Spitting Drake: Search your library for a card named Viashivan Dragon and put that card onto the battlefield. Then shuffle your library.

Shrieking Drake

Flying
When Shrieking Drake enters the battlefield, return a creature you control to its owner’s hand.

Shimmering Efreet

Flying
Phasing (This phases in or out before you untap during each of your untap steps. While it’s phased out, it’s treated as though it doesn’t exist.)
Whenever Shimmering Efreet phases in, target creature phases out. (It phases in before its controller untaps during their next untap step.)

Shrieking Drake

Flying
When Shrieking Drake enters the battlefield, return a creature you control to its owner’s hand.

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.)

Bog Imp

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

Leering Gargoyle

Flying
: Leering Gargoyle gets -2/+2 and loses flying until end of turn.

Teferi’s Imp

Flying
Phasing (This phases in or out before you untap during each of your untap steps. While it’s phased out, it’s treated as though it doesn’t exist.)
Whenever Teferi’s Imp phases out, discard a card.
Whenever Teferi’s Imp phases in, draw a card.

Teeka’s Dragon

Flying; trample; rampage 4 (Whenever this creature becomes blocked, it gets +4/+4 until end of turn for each creature blocking it beyond the first.)

Asmira, Holy Avenger

Flying
At the beginning of each end step, put a +1/+1 counter on Asmira, Holy Avenger for each creature put into your graveyard from the battlefield this turn.

Frenetic Efreet

Flying
: Flip a coin. If you win the flip, Frenetic Efreet phases out. If you lose the flip, sacrifice Frenetic Efreet. (While it’s phased out, it’s treated as though it doesn’t exist. It phases in before you untap during your next untap step.)

Shauku, Endbringer

Flying
Shauku, Endbringer can’t attack if there’s another creature on the battlefield.
At the beginning of your upkeep, you lose 3 life.
: Exile target creature and put a +1/+1 counter on Shauku.

Catacomb Dragon

Flying
Whenever Catacomb Dragon becomes blocked by a nonartifact, non-Dragon creature, that creature gets -X/-0 until end of turn, where X is half the creature’s power, rounded down.