Whenever Astrid Peth enters the battlefield or attacks, create a Food token.

Brand-new Sky — Whenever you sacrifice a Clue or Food, Astrid Peth explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)

When Astroquarium enters the battlefield, you may put an art sticker on it.

, : Until end of turn, target creature becomes a blue Shark with base power and toughness 4/4. If the cracks in Astroquarium's art are completely covered, that creature becomes a blue Octopus with base power and toughness 8/8 instead. Activate only as a sorcery.

As long as it's your turn, outlaws you control have first strike. (Assassins, Mercenaries, Pirates, Rogues, and Warlocks are outlaws.)

Whenever you commit a crime, create a 1/1 red Mercenary creature token with ": Target creature you control gets +1/+0 until end of turn. Activate only as a sorcery." This ability triggers only once each turn.

, : Choose one —

• Prevent the next X damage that would be dealt to target creature this turn. Spend only white mana on X.

• You gain X life. Spend only white mana on X.

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

When Atarka Efreet is turned face up, it deals 1 damage to any target.

Formidable — : Creatures you control gain menace until end of turn. Activate only if creatures you control have total power 8 or greater. (They can't be blocked except by two or more creatures.)

Choose two —

• Your opponents can't gain life this turn.

• Atarka's Command deals 3 damage to each opponent.

• You may put a land card from your hand onto the battlefield.

• Creatures you control get +1/+1 and gain reach until end of turn.

Indestructible

As long as your devotion to white and black is less than seven, Athreos isn't a creature.

Whenever another creature you own dies, return it to your hand unless target opponent pays 3 life.

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Whenever you cast a noncreature spell, put an oil counter on Atmosphere Surgeon.

Remove an oil counter from Atmosphere Surgeon: Target creature gains flying until end of turn. Activate only as a sorcery.

Sacrifice an Atog creature: Atogatog gets +X/+X until end of turn, where X is the sacrificed creature's power.

Whenever you roll a 1 or 2, put that many +1/+1 counters on Atomwheel Acrobats.

: Roll a six-sided die.

Flying, vigilance, deathtouch, lifelink

At the beginning of your end step, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Atraxa's Skitterfang enters the battlefield with three oil counters on it.

At the beginning of combat on your turn, you may remove an oil counter from Atraxa's Skitterfang. When you do, target creature you control gains your choice of flying, vigilance, deathtouch, or lifelink until end of turn.

Menace

When Atris, Oracle of Half-Truths enters the battlefield, target opponent looks at the top three cards of your library and separates them into a face-down pile and a face-up pile. Put one pile into your hand and the other into your graveyard.

Flying, trample

When Atsushi, the Blazing Sky dies, choose one —

• Exile the top two cards of your library. Until the end of your next turn, you may play those cards.

• Create three Treasure tokens.

When Attendant of Vraska dies, if you control a Vraska planeswalker, you gain life equal to Attendant of Vraska's power.

First strike

When Attended Knight enters the battlefield, create a 1/1 white Soldier creature token.

Flying

Whenever Attentive Skywarden deals combat damage to a player or battle, transform up to one target Incubator token you control.

, Sacrifice a creature: Destroy target nonblack creature.

Return Attunement to its owner's hand: Draw three cards, then discard four cards.

Reach

When Atzocan Archer enters the battlefield, you may have it fight another target creature. (Each deals damage equal to its power to the other.)

Audacious Infiltrator can't be blocked by artifact creatures.

Enchant creature

Enchanted creature gets +2/+0 and has trample.

When Audacity is put into a graveyard from the battlefield, draw a card.

Trample

As long as you control eight or more lands, Augmenter Pugilist gets +5/+5.

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

You may play lands from the top of your library.

Coven — As long as you control three or more creatures with different powers, you may cast creature spells from the top of your library.

Other tapped creatures you control get +1/+0.

Other untapped creatures you control get +0/+1.

Whenever you attack, untap each creature you control, then tap any number of creatures you control.

As Auntie's Hovel enters the battlefield, you may reveal a Goblin card from your hand. If you don't, Auntie's Hovel enters the battlefield tapped.

: Add or .

Destroy target enchantment.

Draw a card.

Sacrifice a land: Destroy target enchantment.

Destroy target enchantment. Create X 1/1 green Saproling creature tokens, where X is that enchantment's mana value.

Sacrifice an enchantment: Auratog gets +2/+2 until end of turn.

Flying

Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)

At the beginning of combat on your turn, choose up to one target creature you control. Until end of turn, that creature gets +2/+0, gains trample if it's red, and gains vigilance if it's white.

Flying, vigilance, haste

Whenever Aurelia, the Warleader attacks for the first time each turn, untap all creatures you control. After this phase, there is an additional combat phase.

Whenever a creature deals damage to you, put a gold counter on it.

Each creature with a gold counter on it is a Wall in addition to its other creature types and has defender. (Those creatures can't attack.)

When Aurification leaves the battlefield, remove all gold counters from all creatures.

As long as Auriok Glaivemaster is equipped, it gets +1/+1 and has first strike.

, : Tap target artifact.

Mutate (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

Whenever this creature mutates, exile cards from the top of your library until you exile X permanent cards, where X is the number of times this creature has mutated. Put those permanent cards onto the battlefield.

When Author of Shadows enters the battlefield, exile all opponents' graveyards. Choose a nonland card exiled this way. You may cast that card for as long as it remains exiled, and you may spend mana as though it were mana of any color to cast that spell.

Creatures your opponents control enter the battlefield tapped.

Whenever a creature enters the battlefield under an opponent's control, you gain 1 life.

Autograph Book enters the battlefield with a page counter on it for each person who has signed it.

, , Remove a page counter from Autograph Book: Draw a card.

: Add . Spend this mana only to activate an ability or cast an artifact spell.

When Automatic Librarian enters the battlefield, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

Vigilance

, : Put a +1/+1 counter on target Assembly-Worker you control.

//PRT-Prototype_Mech//

Prototype (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.)

2/2

: Mill a card.

Delirium — At the beginning of your end step, if there are four or more card types among cards in your graveyard, transform Autumnal Gloom.

: Attach target Aura attached to a creature to another creature.

Flying

When this creature transforms into Avacyn, the Purifier, it deals 3 damage to each other creature and each opponent.

Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Avacyn's Judgment deals 2 damage divided as you choose among any number of targets. If this spell's madness cost was paid, it deals X damage divided as you choose among those permanents and/or players instead.

Equipped creature gets +2/+0 and has vigilance and "At the beginning of your upkeep, draw a card."

Whenever equipped creature dies, target opponent gains control of Avarice Amulet.

Equip (: Attach to target creature you control. Equip only as a sorcery.)

( can be paid with either or .)

Flying

When Avatar of Discord enters the battlefield, sacrifice it unless you discard two cards.