Zur the Enchanter

Flying
Whenever Zur the Enchanter attacks, you may search your library for an enchantment card with mana value 3 or less, put it onto the battlefield, then shuffle.

Herald of Leshrac

Flying
Cumulative upkeep—Gain control of a land you don’t control. (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.)
Herald of Leshrac gets +1/+1 for each land you control but don’t own.
When Herald of Leshrac leaves the battlefield, each player gains control of each land they own that you control.

Adarkar Valkyrie

Flying, vigilance
: When target creature other than Adarkar Valkyrie dies this turn, return that card to the battlefield under your control.

Garza Zol, Plague Queen

Flying, haste
Whenever a creature dealt damage by Garza Zol, Plague Queen this turn dies, put a +1/+1 counter on Garza Zol.
Whenever Garza Zol deals combat damage to a player, you may draw a card.

Avatar of Discord

( can be paid with either or .)
Flying
When Avatar of Discord enters, sacrifice it unless you discard two cards.

Celestial Ancient

Flying
Whenever you cast an enchantment spell, put a +1/+1 counter on each creature you control.

Beacon Hawk

Flying
Whenever Beacon Hawk deals combat damage to a player, you may untap target creature.
: Beacon Hawk gets +0/+1 until end of turn.

Sky Hussar

Flying
When Sky Hussar enters, untap all creatures you control.
Forecast — Tap two untapped white and/or blue creatures you control, Reveal Sky Hussar from your hand: Draw a card. (Activate only during your upkeep and only once each turn.)

Windreaver

Flying
: Windreaver gains vigilance until end of turn.
: Windreaver gets +0/+1 until end of turn.
: Switch Windreaver’s power and toughness until end of turn.
: Return Windreaver to its owner’s hand.

Patagia Viper

Flying
When Patagia Viper enters, create two 1/1 green and blue Snake creature tokens.
When Patagia Viper enters, sacrifice it unless was spent to cast it.

Rakdos the Defiler

Flying, trample
Whenever Rakdos the Defiler attacks, sacrifice half the non-Demon permanents you control, rounded up.
Whenever Rakdos deals combat damage to a player, that player sacrifices half the non-Demon permanents they control of their choice, rounded up.

Isperia the Inscrutable

Flying
Whenever Isperia the Inscrutable deals combat damage to a player, choose a card name. That player reveals their hand. If a card with the chosen name is revealed this way, search your library for a creature card with flying, reveal it, put it into your hand, then shuffle.

Wakestone Gargoyle

Defender, flying
: Creatures you control with defender can attack this turn as though they didn’t have defender.

Trygon Predator

Flying
Whenever this creature deals combat damage to a player, you may destroy target artifact or enchantment that player controls.

Silkwing Scout

Flying
, Sacrifice Silkwing Scout: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Tidespout Tyrant

Flying
Whenever you cast a spell, return target permanent to its owner’s hand.

Pride of the Clouds

Flying
Pride of the Clouds gets +1/+1 for each other creature on the battlefield with flying.
Forecast — , Reveal Pride of the Clouds from your hand: Create a 1/1 white and blue Bird creature token with flying. (Activate only during your upkeep and only once each turn.)

Demon’s Jester

Flying
Hellbent — Demon’s Jester gets +2/+1 as long as you have no cards in hand.

Freewind Equenaut

Flying
As long as Freewind Equenaut is enchanted, it has “: Freewind Equenaut deals 2 damage to target attacking or blocking creature.”