Counter target instant spell.

Flash (You may cast this spell any time you could cast an instant.) Flying Whenever you draw your second card each turn, put a +1/+1 counter on this creature.

Flash Valiant — Whenever this creature becomes the target of a spell or ability you control for the first time each turn, tap target creature an opponent controls.

Flash Enchant creature As long as another player controls enchanted creature, it can't attack or block. Otherwise, this Aura has umbra armor. (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)

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.)

When this creature enters, create a Food token. Whenever you expend 4, this creature gets +1/+1 until end of turn. (You expend 4 as you spend your fourth total mana to cast spells during a turn.)

When this artifact enters and when you sacrifice it, create a 1/1 white Rabbit creature token and scry 1. (Look at the top card of your library. You may put that card on the bottom.) {2}, {T}, Sacrifice this artifact: You gain 3 life.

Offspring {1} (You may pay an additional {1} as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.) When this creature enters, target creature you control gets +1/+1 until end of turn.

Whenever you attack, target creature you control gets +1/+0 until end of turn. If that creature is a token, it also gains deathtouch until end of turn.

Whenever another creature you control with power 2 or less enters, target creature you control gets +1/+1 until end of turn.

Vigilance This creature enters with three +1/+1 counters on it.

Lifelink (Damage dealt by this creature also causes you to gain that much life.) When this creature enters, put a +1/+1 counter on each of up to two other target creatures you control.

Kicker {2}{G} (You may pay an additional {2}{G} as you cast this spell.) If this creature was kicked, it enters with two +1/+1 counters on it. Each creature you control with a +1/+1 counter on it has trample. (It can deal excess combat damage to the player or planeswalker it's attacking.)

Flying Whenever another creature you control dies, put a +1/+1 counter on this creature.

Trample When this creature enters, put a +1/+1 counter on it for each other Squirrel and/or Food you control. Whenever another Squirrel or Food you control enters, put a +1/+1 counter on this creature.

Vigilance, trample If one or more +1/+1 counters would be put on Mowu, that many plus one +1/+1 counters are put on it instead.

Flying When this creature enters, put a +1/+1 counter on target creature you control without flying.

When this creature enters, put a +1/+1 counter on target creature you control. Each creature you control with a +1/+1 counter on it has trample. (It can deal excess combat damage to the player or planeswalker it's attacking.)

Whenever you cast a creature spell, create a 3/3 green Beast creature token. Whenever you cast a noncreature spell, put three +1/+1 counters on target creature you control. Landfall — Whenever a land you control enters, you gain 3 life.

{T}: Add one mana of any color in your commander's color identity. Sacrifice this artifact: Draw a card.

Disguise {G} (You may cast this card face down for {3} as a 2/2 creature with ward {2}. Turn it face up any time for its disguise cost.) When this creature is turned face up, search your library for a land card with a basic land type, reveal it, put it into your hand, then shuffle.

Changeling (This card is every creature type.) {1}: Add one mana of any color. Activate only once each turn.

Flying

Flying Whenever this creature 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.)

Flash Flying When this creature enters, target creature an opponent controls gets -2/-0 until end of turn.

Offspring {3} (You may pay an additional {3} as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.) Flying When this creature enters, target creature you control gains flying until end of turn.

Flying; banding (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 you control are blocking or being blocked by a creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)

Flying {1}{W}: This creature gains vigilance until end of turn.

Flying {1}{W}: This creature gains vigilance and lifelink until end of turn. (Attacking doesn't cause it to tap. Damage dealt by it also causes you to gain that much life.)

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

Indestructible {T}: Add {C}.

({T}: Add {G}.)

({T}: Add {U}.)

{T}: Add {C}. {T}: Add {U}. Spend this mana only to cast a creature spell. {U}, {T}: Surveil 2. Activate only if a Bird, Frog, Otter, or Rat entered the battlefield under your control this turn.

This land enters tapped. When this land enters, it deals 1 damage to target opponent. {T}: Add {W} or {U}.

({T}: Add {W}.)

This land enters tapped. When this land enters, sacrifice it unless you tap an untapped artifact or land you control. {T}: Add one mana of any color.

You have no maximum hand size. {T}: Add {C}.

This land enters tapped. {T}: Add {G} or {W}.

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

This land enters tapped. When this land enters, you gain 1 life. {T}: Add {G} or {U}.

This land enters tapped. As it enters, choose a color other than green. {T}: Add {G} or one mana of the chosen color.

Mill four cards. You may put a permanent card from among the cards milled this way into your hand. If you control a Squirrel or returned a Squirrel card to your hand this way, create a Food token. (To mill four cards, put the top four cards of your library into your graveyard. A Food token is an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.")

Flash Enchant creature When this Aura enters, draw a card. Enchanted creature gets +1/+0 and has flying.

When this creature enters, draw a card.

Flash (You may cast this spell any time you could cast an instant.) Whenever this creature is dealt damage, draw that many cards.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) When this creature enters, surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

Flying When this creature enters, draw two cards. Evoke {2}{U} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters.)

Trample Keen Senses — When this creature enters, draw a card.

This spell costs {1} less to cast if you control an Otter. Draw two cards.

When this creature enters, draw a card.

Flying Whenever an artifact you control enters, you may draw a card. If you do, discard a card.

When this creature enters, draw a card.

Whenever this creature deals damage to an opponent, draw a card.

When this artifact enters, create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.") {5}, {T}, Sacrifice this artifact: Destroy target nonland permanent. Activate only as a sorcery.

When Lagrella enters, exile any number of other target creatures controlled by different players until Lagrella leaves the battlefield. When an exiled card enters under your control this way, put two +1/+1 counters on it.

Counter target noncreature spell.

Counter target spell unless its controller pays {2}. Suspect up to one target creature. (A suspected creature has menace and can't block.)

Choose two target creatures controlled by different players. Return those creatures to their owners' hands.