Keyword: Flying

Flying
Whenever Slith Ascendant deals combat damage to a player, put a +1/+1 counter on it.

Flying
Whenever Bladegriff Prototype deals combat damage to a player, destroy target nonland permanent of that player’s choice that one of your opponents controls.

Flying
When Sparktongue Dragon enters the battlefield, you may pay . When you do, it deals 3 damage to any target.

Flying
When Flickerwisp enters the battlefield, exile another target permanent. Return that card to the battlefield under its owner’s control at the beginning of the next end step.

Flying
When Mulldrifter enters the battlefield, draw two cards.
Evoke (You may cast this spell for its evoke cost. If you do, it’s sacrificed when it enters the battlefield.)

Rather than pay for each previous time you’ve cast this spell from the command zone this game, pay 2 life that many times.
Flying, lifelink
Whenever a player casts a spell, they lose 2 life.

Flying
When Archon of Coronation enters the battlefield, you become the monarch.
As long as you’re the monarch, damage doesn’t cause you to lose life. (When a creature deals combat damage to you, its controller still becomes the monarch.)

Flying, first strike, vigilance, trample
At the beginning of each combat, until end of turn, each other creature you control gets +1/+1 if it has flying, +1/+1 if it has first strike, and so on for double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, protection, reach, trample, vigilance, and partner.
Partner

Flying
Whenever Siani, Eye of the Storm attacks, scry X, where X is the number of attacking creatures with flying.
Partner (You can have two commanders if both have partner.)

Flying
, Sacrifice Siren Stormtamer: Counter target spell or ability that targets you or a creature you control.

Flying
Whenever a creature attacks, you may pay . When you do, put a +1/+1 counter on that creature.

Flying
, Return a land you control to its owner’s hand: Create a 1/1 blue Illusion creature token with flying.

Flying, haste
Whenever an opponent casts their second spell each turn, draw a card.
Partner (You can have two commanders if both have partner.)

Flying
Tap another untapped creature you control with flying: Radiant, Serra Archangel gains protection from the color of your choice until end of turn.
Partner (You can have two commanders if both have partner.)

Flying
Whenever Kangee’s Lieutenant attacks, attacking creatures with flying get +1/+1 until end of turn.
Encore (, Exile this card from your graveyard: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)

Flying
Other creatures you control get +1/+1.
At the beginning of your upkeep, you may return target creature card from your graveyard to your hand.
Partner (You can have two commanders if both have partner.)

Flying
Whenever Zur the Enchanter attacks, you may search your library for an enchantment card with converted mana cost 3 or less and put it onto the battlefield. If you do, shuffle your library.

Flying
When Patron of the Valiant enters the battlefield, put a +1/+1 counter on each creature you control with a +1/+1 counter on it.

Flying
Spells your opponents cast that target one or more commanders you control cost more to cast.
Partner (You can have two commanders if both have partner.)

Flying
When Mulldrifter enters the battlefield, draw two cards.
Evoke (You may cast this spell for its evoke cost. If you do, it’s sacrificed when it enters the battlefield.)

Flying
Whenever another creature dies, put two +1/+1 counters on Sengir, the Dark Baron.
Whenever another player loses the game, you gain life equal to that player’s life total as the turn began.
Partner (You can have two commanders if both have partner.)

Flying
Whenever another permanent enters the battlefield under your control, look at the top card of your library. If it shares a card type with that permanent, you may reveal that card and put it into your hand.

Flying
Revenant’s power and toughness are each equal to the number of creature cards in your graveyard.

Flying
Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.)
Whenever you cast a spell with cascade, return Aurora Phoenix from your graveyard to your hand.

Flying
When Noxious Dragon dies, you may destroy target creature with converted mana cost 3 or less.