Target creature gets +4/-4 until end of turn.

: Augmenting Automaton gets +1/+1 until end of turn.

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.

: Regenerate Augur of Skulls.

Sacrifice Augur of Skulls: Target player discards two cards. Activate only during your upkeep.

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.)

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 .

Each enchantment deals 2 damage to its controller, then each Aura attached to a creature deals 2 damage to the creature it's attached to.

Put target enchantment on top of its owner's library.

Cycling (, Discard this card: Draw a card.)

Other enchantments have "At the beginning of your upkeep, sacrifice this enchantment unless you pay ."

Creatures with power less than Aura Gnarlid's power can't block it.

Aura Gnarlid gets +1/+1 for each Aura on the battlefield.

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

Artifact and enchantment spells your opponents cast cost more to cast.

Sacrifice Aura of Silence: Destroy target artifact or enchantment.

Flying

When Aura Thief dies, you gain control of all enchantments. (You don't get to move Auras.)

Enchant creature

Enchanted creature gets +2/+2 for each Aura attached to it and has vigilance.

When Auratouched Mage enters the battlefield, search your library for an Aura card that could enchant it. If Auratouched Mage is still on the battlefield, put that Aura card onto the battlefield attached to it. Otherwise, reveal the Aura card and put it into your hand. Then shuffle.

Flying, vigilance, haste

Whenever a player attacks with three or more creatures, you draw a card.

Whenever a player attacks with five or more creatures, Aurelia, the Law Above deals 3 damage to each of your opponents and you gain 3 life.

Aurelia's Fury deals X damage divided as you choose among any number of targets. Tap each creature dealt damage this way. Players dealt damage this way can't cast noncreature spells this turn.

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.

Protection from black and from red

Whenever another creature enters the battlefield, you may gain 1 life.

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

: Return target artifact card with mana value 1 or less from your graveyard to your hand.

Equip costs you pay cost less.

As long as Auriok Steelshaper is equipped, each creature you control that's a Soldier or a Knight gets +1/+1.

When Auriok Survivors enters the battlefield, you may return target Equipment card from your graveyard to the battlefield. If you do, you may attach it to Auriok Survivors.

Flying

: Attach target Equipment you control to target creature you control.

Trample

When Aurochs Herd enters the battlefield, you may search your library for an Aurochs card, reveal it, put it into your hand, then shuffle.

Whenever Aurochs Herd attacks, it gets +1/+0 until end of turn for each other attacking Aurochs.

, Sacrifice Aurora Eidolon: Prevent the next 3 damage that would be dealt to any target this turn.

Whenever you cast a multicolored spell, you may return Aurora Eidolon from your graveyard to your hand.

Flying, deathtouch

Whenever Aurora of Emrakul attacks, each opponent loses 3 life.

When Auspicious Ancestor dies, you gain 3 life.

Whenever a player casts a white spell, you may pay . If you do, you gain 1 life.

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, vigilance, indestructible

Other permanents you control have indestructible.

Flying

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

, : Tap target non-Human creature.

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.

: Add .

: Target snow land you control becomes a 4/4 Elemental creature with hexproof and haste until end of turn. It's still a land. (A creature with hexproof can't be the target of spells or abilities your opponents control.)

Whenever Avalanche Tusker attacks, target creature defending player controls blocks it this combat if able.

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.)

Flying

At the beginning of your draw step, draw an additional card.

At the beginning of your end step, discard your hand.

If an opponent controls seven or more lands, this spell costs less to cast.

Flying

: Avatar of Fury gets +1/+0 until end of turn.

If you have 3 or less life, this spell costs less to cast.

Flying

Avatar of Hope can block any number of creatures.

If an opponent controls at least four more creatures than you, this spell costs less to cast.

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)