Draw a card for each Bird on the battlefield.

{T}: Add {C}.

{2}, {T}: Put a +1/+1 counter on target Bird, Cat, Dog, Goat, Ox, or Snake.

{T}: Add one mana of any color in your commander's color identity.

Arctic Flats enters the battlefield tapped.

{T}: Add {G} or {W}.

({T}: Add {G} or {W}.)

Arctic Treeline enters the battlefield tapped.

Flying

Whenever Aven Courier attacks, choose a counter on a permanent you control. Put a counter of that kind on target permanent you control if it doesn't have a counter of that kind on it.

Flying

Morph {3}{W} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

When Aven Liberator is turned face up, target creature you control gains protection from the color of your choice until end of turn.

Flying

At the beginning of your upkeep, you may put a feather counter on target creature. If you do, that creature has base power and toughness 3/1 and has flying for as long as it has a feather counter on it.

Flash

Flying

If an opponent would search a library, that player searches the top four cards of that library instead.

Flying

{1}, {T}: Add {W}{U}.

Create two 1/1 white Bird creature tokens with flying.

Flashback--Tap three untapped white creatures you control. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Flying, first strike

Flying

{T}: Add one mana of any color.

Boreal Shelf enters the battlefield tapped.

{T}: Add {W} or {U}.

Boseiju, Who Shelters All enters the battlefield tapped.

{T}, Pay 2 life: Add {C}. If that mana is spent on an instant or sorcery spell, that spell can't be countered.

Revolt -- At the beginning of your end step, if a permanent you controlled left the battlefield this turn, put a unity counter on Call for Unity.

Creatures you control get +1/+1 for each unity counter on Call for Unity.

Flying

When Cartographer's Hawk deals combat damage to a player who controls more lands than you, return it to its owner's hand. If you do, you may search your library for a Plains card, put it onto the battlefield tapped, then shuffle.

Flying

When Celestial Gatekeeper dies, exile it, then return up to two target Bird and/or Cleric permanent cards from your graveyard to the battlefield.

Spells you control can't be countered.

At the beginning of your end step, discover 5. (Exile cards from the top of your library until you exile a nonland card with mana value 5 or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)

Flying

When Cloudchaser Kestrel enters the battlefield, destroy target enchantment.

{W}: Target permanent becomes white until end of turn.

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.)

Flying, protection from creatures

Flying

Tap two untapped Birds you control: Draw a card.

Tap two untapped Wizards you control: Target creature gains flying until end of turn.

Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.

Flying

You have no maximum hand size.

Whenever a creature token you control deals combat damage to a player, draw a card.

{U}, {T}: Target creature gains flying and becomes blue until end of turn.

Flying

When Eagle of Deliverance enters the battlefield, put an indestructible counter on another target creature you control. Draw a card if that creature's power is 2 or less.

Flying

When Eagles of the North enters the battlefield, creatures you control get +1/+0 and gain first strike until end of turn.

Plainscycling {1} ({1}, Discard this card: Search your library for a Plains card, reveal it, put it into your hand, then shuffle.)

Flying

Other creatures you control with flying get +1/+1.

Flying

Spells your opponents cast that target one or more commanders you control cost {3} more to cast.

Partner (You can have two commanders if both have partner.)

{T}, Sacrifice Evolving Wilds: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Create a 1/1 white Bird creature token with flying, then populate. (Create a token that's a copy of a creature token you control.)

Flying, trample

Falco Spara, Pactweaver enters the battlefield with a shield counter on it.

You may look at the top card of your library any time.

You may cast spells from the top of your library by removing a counter from a creature you control in addition to paying their other costs.

Create X 1/1 white Bird Soldier creature tokens with flying, where X is the number of attacking creatures.

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

Flying

When Gilded Goose enters the battlefield, create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this artifact: You gain 3 life.")

{1}{G}, {T}: Create a Food token.

{T}, Sacrifice a Food: Add one mana of any color.

({T}: Add {W} or {U}.)

Glacial Floodplain enters the battlefield tapped.

This spell costs {2} less to cast as long as you've drawn two or more cards this turn.

Flying, vigilance

Other Birds you control have vigilance.

Flying

Whenever Gwaihir attacks, target attacking creature gains flying until end of turn.

At the beginning of each end step, if you gained 3 or more life this turn, create a 3/3 white Bird creature token with flying and "Whenever this creature attacks, target attacking creature gains flying until end of turn."

Flying

High Sentinels of Arashin gets +1/+1 for each other creature you control with a +1/+1 counter on it.

{3}{W}: Put a +1/+1 counter on target creature.

Flying

Morph {1}{G}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

When Icefeather Aven is turned face up, you may return another target creature to its owner's hand.

Search your library for a snow land card, put it onto the battlefield tapped, then shuffle.

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

Flying

Whenever Kangee's Lieutenant attacks, attacking creatures with flying get +1/+1 until end of turn.

Encore {5}{W} ({5}{W}, 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.)

Kicker {X}{2} (You may pay an additional {X}{2} as you cast this spell.)

Flying

When Kangee, Aerie Keeper enters the battlefield, if it was kicked, put X feather counters on it.

Other Bird creatures get +1/+1 for each feather counter on Kangee, Aerie Keeper.

Flying, vigilance

Whenever Kangee, Sky Warden attacks, attacking creatures with flying get +2/+0 until end of turn.

Whenever Kangee blocks, blocking creatures with flying get +0/+2 until end of turn.

Homunculus Servant -- When Kenku Artificer enters the battlefield, put three +1/+1 counters on up to one target noncreature artifact. That artifact becomes a 0/0 Homunculus artifact creature with flying.

Flying

Whenever two or more creatures you control attack a player, target attacking creature without flying gains flying until end of turn.

This spell can't be countered.

Counter target spell.

Whenever Marit Lage's Slumber or another snow permanent enters the battlefield under your control, scry 1.

At the beginning of your upkeep, if you control ten or more snow permanents, sacrifice Marit Lage's Slumber. If you do, create Marit Lage, a legendary 20/20 black Avatar creature token with flying and indestructible.

Flying

Whenever Meneldor, Swift Savior deals combat damage to a player, exile up to one target creature you own, then return it to the battlefield under your control.

Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

Cycling {2} ({2}, Discard this card: Draw a card.)

Create four 1/1 white Bird creature tokens with flying.

Basic landcycling {2} ({2}, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)

Flying

{2}: Target player mills a card. Mindshrieker gets +X/+X until end of turn, where X is the milled card's mana value.

Flying

When Mist Raven enters the battlefield, return target creature to its owner's hand.

Myriad Landscape enters the battlefield tapped.

{T}: Add {C}.

{2}, {T}, Sacrifice Myriad Landscape: Search your library for up to two basic land cards that share a land type, put them onto the battlefield tapped, then shuffle.

Flying

At the beginning of combat on your turn, populate. (Create a token that's a copy of a creature token you control.)

Whenever a creature token enters the battlefield under your control, put a +1/+1 counter on Nesting Dovehawk.

Surge {U}{U} (You may cast this spell for its surge cost if you or a teammate has cast another spell this turn.)

This spell can't be countered.

Counter target spell.

Mama's Coming -- Whenever Owlbear Cub attacks a player who controls eight or more lands, look at the top eight cards of your library. You may put a creature card from among them onto the battlefield tapped and attacking that player. Put the rest on the bottom of your library in a random order.

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Exile target artifact or creature. Its controller creates a 1/1 blue Bird creature token with flying.

Foretell {U} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

{T}: Add one mana of any color.

At the beginning of your upkeep, put a night counter on Replicating Ring. Then if it has eight or more night counters on it, remove all of them and create eight colorless snow artifact tokens named Replicated Ring with "{T}: Add one mana of any color."

Flying

Rimefeather Owl's power and toughness are each equal to the number of snow permanents on the battlefield.

{1}{S}: Put an ice counter on target permanent.

Permanents with ice counters on them are snow.

({T}: Add {G} or {U}.)

Rimewood Falls enters the battlefield tapped.

Create two 2/2 blue Bird enchantment creature tokens with flying. Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

Defender (This creature can't attack.)

When Roc Egg dies, create a 3/3 white Bird creature token with flying.

Exile target creature card from your graveyard. Create X 1/1 white Bird creature tokens with flying, where X is the exiled card's toughness.

Flying

Keen Sight -- When Scouting Hawk enters the battlefield, if an opponent controls more lands than you, search your library for a basic Plains card, put it onto the battlefield tapped, then shuffle.

{T}: Add {C}.

{1}{S}, {T}: Look at the top card of your library. If that card is snow, you may reveal it and put it into your hand. ({S} can be paid with one mana from a snow source.)

Search your library for a snow permanent card, a legendary card, or a Saga card, reveal it, put it into your hand, then shuffle. You gain 1 life for each {S} spent to cast this spell. ({S} is mana from a snow source.)

{T}: Add {C}.

{W}{U}, {T}, Sacrifice a Bird: Draw a card.

{1}, {T}: Add {G}{W}.

{1}, {T}: Add {G}{U}.

Flying

Whenever Skymark Roc attacks, you may return target creature defending player controls with toughness 2 or less to its owner's hand.

{T}: Add {C}{C}.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)

I -- Scry 2, then draw two cards.

II -- Create a Treasure token and a 2/2 blue Bird creature token with flying.

III -- Put a flying counter on each creature you control without flying.

Bird creatures get +1/+1.

{1}{W}: Target Bird creature gains banding until end of turn. (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 a player controls are blocking or being blocked by a creature, that player divides that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)

Whenever a Bird is put into your graveyard from the battlefield, put a feather counter on Soulcatchers' Aerie.

Bird creatures get +1/+1 for each feather counter on Soulcatchers' Aerie.

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

Counter target enchantment, instant, or sorcery spell. Its controller creates a 2/2 blue Bird creature token with flying.

{T}, Sacrifice Terramorphic Expanse: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Flying

Whenever you cast a historic spell, return target creature card with mana value 3 or less from your graveyard to the battlefield. (Artifacts, legendaries, and Sagas are historic.)

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)

I -- Create a 1/1 blue Bird creature token with flying. You gain 2 life.

II -- Whenever one or more creatures you control with flying deal combat damage to a player this turn, look at that player's hand and draw a card.

III -- You may put a card you own from outside the game on top of your library.

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

Whenever Thieving Magpie deals damage to an opponent, draw a card.

Flying

Creature spells with flying you cast cost {1} less to cast.

Flying

Creature spells with flying you cast cost {1} less to cast.

Whenever another creature with flying enters the battlefield under your control, Watcher of the Spheres gets +1/+1 until end of turn.

{G}{G}, {T}: Target creature can't be regenerated this turn. Damage that would be dealt to that creature this turn can't be prevented or dealt instead to another permanent or player. When the creature dies this turn, exile the creature.