As Adaptive Automaton enters the battlefield, choose a creature type.

Adaptive Automaton is the chosen type in addition to its other types.

Other creatures you control of the chosen type get +1/+1.

Flying

Whenever Aetherstorm Roc or another creature enters the battlefield under your control, you get {E} (an energy counter).

Whenever Aetherstorm Roc attacks, you may pay {E}{E}. If you do, put a +1/+1 counter on it and tap up to one target creature defending player controls.

Draw a card for each Bird on the battlefield.

Nontoken creatures you control get +1/+1 and have vigilance.

Multikicker {1}{W} (You may pay an additional {1}{W} any number of times as you cast this spell.)

Flying

Apex Hawks enters the battlefield with a +1/+1 counter on it for each time it was kicked.

Creatures you control have flying.

Creatures your opponents control lose flying and can't have or gain flying.

Flying

Whenever Archon of Redemption or another creature with flying enters the battlefield under your control, you may gain life equal to that creature's power.

Flying

Arctic Aven gets +1/+1 as long as you control a Plains.

{W}: Arctic Aven gains lifelink until end of turn. (Damage dealt by this creature also causes you to gain that much life.)

Flying

When Augury Owl enters the battlefield, scry 3. (Look at the top three cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

Flying

Other Bird creatures get +1/+1.

Other Soldier creatures get +1/+1.

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

When Aven Cloudchaser enters the battlefield, destroy target enchantment.

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

Double strike (This creature deals both first-strike and regular combat damage.)

Megamorph {4}{W} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.)

Flying

When Aven Surveyor enters the battlefield, choose one --

• Put a +1/+1 counter on Aven Surveyor.

• Return target creature to its owner's hand.

Amplify 1 (As this creature enters the battlefield, put a +1/+1 counter on it for each Bird and/or Soldier card you reveal in your hand.)

Flying

Choose one --

• Creatures you control gain lifelink until end of turn.

• Draw a card.

• Put target attacking or blocking creature on top of its owner's library.

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

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

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

{W}{U}: Azorius Keyrune becomes a 2/2 white and blue Bird artifact creature with flying until end of turn.

{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.)

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

{1}{U}, {T}: Creatures your opponents control attack this turn if able.

Draw three cards, then put two cards from your hand on top of your library in any order.

As Brass Herald enters the battlefield, choose a creature type.

When Brass Herald enters the battlefield, reveal the top four cards of your library. Put all creature cards of the chosen type revealed this way into your hand and the rest on the bottom of your library in any order.

Creatures of the chosen type get +1/+1.

Enchant creature

At the beginning of your upkeep, you may look at the top five cards of your library. If you do, you may put a creature card that shares a creature type with enchanted creature from among them onto the battlefield, then you put the rest of those cards on the bottom of your library in any order.

Counter target spell.

Whenever a creature enters the battlefield under your control, put a +1/+1 counter on each creature you control.

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.

Flying

When Cloudchaser Eagle enters the battlefield, destroy target enchantment.

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.)

Whenever a creature you control deals combat damage to an opponent, you may draw a card.

Each creature gets +1/+1 for each other creature on the battlefield that shares at least one creature type with it. (For example, if two Goblin Warriors and a Goblin Shaman are on the battlefield, each gets +2/+2.)

Coldsteel Heart enters the battlefield tapped.

As Coldsteel Heart enters the battlefield, choose a color.

{T}: Add one mana of the chosen color.

Flying, protection from creatures

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

Sacrifice Commander's Sphere: Draw a card.

Put target attacking creature on the bottom of its owner's library. Its controller gains life equal to its toughness.

When Contagion Clasp enters the battlefield, put a -1/-1 counter on target creature.

{4}, {T}: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

When Contagion Engine enters the battlefield, put a -1/-1 counter on each creature target player controls.

{4}, {T}: Proliferate, then proliferate again. (Choose any number of permanents and/or players, then give each another counter of each kind already there. Then do it again.)

Counter target spell.

Flying

Whenever Coveted Peacock attacks, you may goad target creature defending player controls. (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.)

Flying

Tap two untapped Birds you control: Draw a card.

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

Tap two untapped creatures you control: You may put a creature card from your hand that shares a creature type with each creature tapped this way onto the battlefield.

Return target nonland permanent you don't control to its owner's hand.

Overload {6}{U} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

Indestructible

{T}: Add one mana of any color.

Flying

When Dawnfeather Eagle enters the battlefield, creatures you control get +1/+1 and gain vigilance until end of turn.

When Detention Sphere enters the battlefield, you may exile target nonland permanent not named Detention Sphere and all other permanents with the same name as that permanent.

When Detention Sphere leaves the battlefield, return the exiled cards to the battlefield under their owner's control.

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

Destroy target artifact or enchantment. If this spell was kicked, draw two cards.

Choose a creature type. Draw a card for each permanent you control of that type.

As Door of Destinies enters the battlefield, choose a creature type.

Whenever you cast a spell of the chosen type, put a charge counter on Door of Destinies.

Creatures you control of the chosen type get +1/+1 for each charge counter on Door of Destinies.

({W/U} can be paid with either {W} or {U}.)

Whenever a player casts a noncreature spell, counter that spell. That player creates X 1/1 white and blue Bird creature tokens with flying, where X is the spell's mana value.

Flying

Landfall -- Whenever a land enters the battlefield under your control, you may create a 1/1 white Bird creature token with flying.

Search your library for an artifact or enchantment card, reveal it, then shuffle and put that card on top.

Multikicker {2} (You may pay an additional {2} any number of times as you cast this spell.)

Everflowing Chalice enters the battlefield with a charge counter on it for each time it was kicked.

{T}: Add {C} for each charge counter on Everflowing Chalice.

Reveal the top five cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard.

Creatures you control with flying get +1/+1.

Counter target spell, then proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you.

{T}: Add three mana of any one color.

Creatures with flying get +2/+0.

Creatures without flying get -2/-0.

Flying

Whenever a creature you control becomes blocked, you may untap that creature and remove it from combat.

Each player chooses a creature type. Destroy all creatures that aren't of a type chosen this way. They can't be regenerated.

Flying

{U}, Sacrifice Hydromorph Gull: Counter target spell that targets a creature you control.

Flying

Whenever Impaler Shrike deals combat damage to a player, you may sacrifice it. If you do, draw three cards.

Whenever you cast a spell, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Flying

Whenever an opponent casts a spell, put a +1/+1 counter on Ishai, Ojutai Dragonspeaker.

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

Flying

Sacrifice Judge's Familiar: Counter target instant or sorcery spell unless its controller pays {1}.

Cumulative upkeep {W} or {U} (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.)

When Jötun Owl Keeper dies, create a 1/1 white Bird creature token with flying for each age counter on it.

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

{T}, Tap two untapped Birds you control: Return target permanent to its owner's hand.

Konda's Banner can be attached only to a legendary creature.

Creatures that share a color with equipped creature get +1/+1.

Creatures that share a creature type with equipped creature get +1/+1.

Equip {2}

Flying

{1}{W}, Sacrifice Lieutenant Kirtar: Exile target attacking creature.

Equipped creature has haste and shroud. (It can't be the target of spells or abilities.)

Equip {0}

Creatures without flying can't attack.

Flying

{3}{W}{W}, Sacrifice Major Teroh: Exile all black creatures.

Multikicker {1}{W} (You may pay an additional {1}{W} any number of times as you cast this spell.)

Creatures you control get +1/+1.

When Marshal's Anthem enters the battlefield, return up to X target creature cards from your graveyard to the battlefield, where X is the number of times Marshal's Anthem was kicked.

Flying

Council's dilemma -- When Messenger Jays enters the battlefield, starting with you, each player votes for feather or quill. Put a +1/+1 counter on Messenger Jays for each feather vote and draw a card for each quill vote. For each card drawn this way, discard a card.

As Metallic Mimic enters the battlefield, choose a creature type.

Metallic Mimic is the chosen type in addition to its other types.

Each other creature you control of the chosen type enters the battlefield with an additional +1/+1 counter on it.

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.

Changeling (This card is every creature type.)

{X}: Until end of turn, creatures you control have base power and toughness X/X and gain all creature types.

Flying

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

Flying

Whenever another creature dies, you may draw a card. If you do, discard a card.

Search your library for an instant or sorcery card, reveal it, then shuffle and put that card on top.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)

As Obelisk of Urd enters the battlefield, choose a creature type.

Creatures you control of the chosen type get +2/+2.

When Oblivion Ring enters the battlefield, exile another target nonland permanent.

When Oblivion Ring leaves the battlefield, return the exiled card to the battlefield under its owner's control.

Choose two --

• Return target creature card with mana value 2 or less from your graveyard to the battlefield.

• You gain 4 life.

• Counter target creature spell.

• Draw a card.

Flying

When Owl Familiar enters the battlefield, draw a card, then discard a card.

Flying

When Palace Familiar dies, draw a card.

Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Flying

Pride of the Clouds gets +1/+1 for each other creature with flying on the battlefield.

Forecast -- {2}{W}{U}, 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.)

Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you.

Flying

Echo {2}{U} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

When Raven Familiar enters the battlefield, look at the top three cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.

Counter target spell. Its controller can't cast spells this turn.

Exile target artifact or enchantment. If you cast this spell during your main phase, you may exile up to one other target artifact or enchantment.

Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.

Kicker {5} (You may pay an additional {5} as you cast this spell.)

Create a token that's a copy of target creature. If this spell was kicked, create five of those tokens instead.

Flying

When Sage Owl enters the battlefield, look at the top four cards of your library, then put them back in any order.

Flying

When Sawtooth Loon enters the battlefield, return a white or blue creature you control to its owner's hand.

When Sawtooth Loon enters the battlefield, draw two cards, then put two cards from your hand on the bottom of your library.

{T}: Add {C}.

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

Creatures with flying get +1/+1.

As Shared Triumph enters the battlefield, choose a creature type.

Creatures of the chosen type get +1/+1.

Flying

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

Equipped creature gets +1/-1.

Whenever equipped creature dies, draw two cards.

Equip {1}

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}.

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.)

Flying

Whenever a creature with flying dies, put a +1/+1 counter on Soulcatcher.

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.

You gain X life and draw X cards.

Flying

When Spire Owl enters the battlefield, look at the top four cards of your library, then put them back in any order.

Equipped creature gets +1/+1 for each other creature you control that shares a creature type with it.

Equip {2}

Flying

White spells and black spells you cast cost {1} less to cast.

Islandwalk (This creature can't be blocked as long as defending player controls an Island.)

All lands are Islands in addition to their other types.

Creatures without flying or islandwalk can't attack.

This spell can't be countered.

Destroy all creatures.

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

Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control.)

Equip {1}

Exile target creature. Its controller gains life equal to its power.

{T}: Add {C}.

{T}: Add {W} or {U}. Talisman of Progress deals 1 damage to you.

({U/P} can be paid with either {U} or 2 life.)

Draw two cards, then proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

You have no maximum hand size.

{T}: Add {C}.

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

Flash (You may cast this spell any time you could cast an instant.)

Flying

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

Flying

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

Creatures you control have double strike and lifelink.

As Urza's Incubator enters the battlefield, choose a creature type.

Creature spells of the chosen type cost {2} less to cast.

Flying

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

Flying

Attacking creatures you control have lifelink.

Flying

Whenever a creature with flying attacks, you may draw a card.

Target player sacrifices an attacking creature.

Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)

Flying

Raid -- When Wingmate Roc enters the battlefield, if you attacked this turn, create a 3/4 white Bird creature token with flying.

Whenever Wingmate Roc attacks, you gain 1 life for each attacking creature.

Worn Powerstone enters the battlefield tapped.

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