Flying
Evolve (Whenever a creature enters the battlefield under your control, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)
When Faerie Impostor enters the battlefield, sacrifice it unless you return another creature you control to its owner's hand.
Sacrifice Judge's Familiar: Counter target instant or sorcery spell unless its controller pays .
Spire Tracer can't be blocked except by creatures with flying or reach.
Extort (Whenever you cast a spell, you may pay . If you do, each opponent loses 1 life and you gain that much life.)
Lifelink (Damage dealt by this creature also causes you to gain that much life.)
Battalion — Whenever Daring Skyjek and at least two other creatures attack, Daring Skyjek gains flying until end of turn.
: Metropolis Sprite gets +1/-1 until end of turn.
: Target creature gains flying until end of turn.
: Detain target nonland permanent an opponent controls. (Until your next turn, that permanent can't attack or block and its activated abilities can't be activated.)
Nimbus Swimmer enters the battlefield with X +1/+1 counters on it.
: Beetleform Mage gets +2/+2 and gains flying until end of turn. Activate this ability only once each turn.
Reach (This creature can block creatures with flying.)
Flying, trample
: Goblin Test Pilot deals 2 damage to target creature or player chosen at random.
Defender, flying
When Lyev Skyknight enters the battlefield, detain target nonland permanent an opponent controls. (Until your next turn, that permanent can't attack or block and its activated abilities can't be activated.)
Whenever Nightveil Specter deals combat damage to a player, that player exiles the top card of his or her library.
You may play cards exiled with Nightveil Specter.
Unleash (You may have this creature enter the battlefield with a +1/+1 counter on it. It can't block as long as it has a +1/+1 counter on it.)
When Seller of Songbirds enters the battlefield, put a 1/1 white Bird creature token with flying onto the battlefield.
Flying, haste
: Tower Drake gets +0/+1 until end of turn.
Defender
: Regenerate Trestle Troll.