Aspect of Hydra

Instant

Target creature gets +X/+X until end of turn, where X is your devotion to green. (Each in the mana costs of permanents you control counts toward your devotion to green.)

"Even alone I outnumber you."

Aspect of Gorgon

Enchantment - Aura

Enchant creature

Enchanted creature gets +1/+3 and has deathtouch. (Any amount of damage it deals to a creature is enough to destroy it.)

"My adopted children are loved no less."
-Pharika, god of affliction

Ashmouth Hound

Creature - Elemental Hound

Whenever Ashmouth Hound blocks or becomes blocked by a creature, Ashmouth Hound deals 1 damage to that creature.

Its fiery paws make it easy to track, which is very useful when you want to go in exactly the opposite direction.

Ashiok, Nightmare Weaver

Planeswalker - Ashiok (Loyalty: 3)

+2: Exile the top three cards of target opponent's library.

-X: Put a creature card with converted mana cost X exiled with Ashiok, Nightmare Weaver onto the battlefield under your control. That creature is a Nightmare in addition to its other types.

-10: Exile all cards from all opponents' hands and graveyards.

Ashiok's Adept

Creature - Human Wizard

Heroic - Whenever you cast a spell that targets Ashiok's Adept, each opponent discards a card.

"Every nightmare is a caged bird that yearns to be set free."
-Ashiok, Nightmare Weaver

Ashen Rider

Creature - Archon

Flying

When Ashen Rider enters the battlefield or dies, exile target permanent.

One offering to appease her on her arrival. Another to celebrate her departure.

Ashcloud Phoenix

Creature - Phoenix

Flying

When Ashcloud Phoenix dies, return it to the battlefield face down.

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

When Ashcloud Phoenix is turned face up, it deals 2 damage to each player.

Asha's Favor

Enchantment - Aura

Enchant creature

Enchanted creature has flying, first strike, and vigilance.

As his new wings lifted him high above Bant, Taric felt his earthly aspirations transform into heavenly resolve.

Ash Zealot

Creature - Human Warrior

First strike, haste

Whenever a player casts a spell from a graveyard, Ash Zealot deals 3 damage to that player.

"Smarter than death? Let's see you outsmart my mace, necromancer!"

Asceticism

Enchantment

Creatures you control have hexproof. (They can't be the targets of spells or abilities your opponents control.)

: Regenerate target creature.

"Let my ignominy build walls thicker than iron and stronger than darksteel."
-Thrun, the last troll

Ascended Lawmage

Creature - Vedalken Wizard

Flying, hexproof

A lawmage's runic script is an act of governance given form: legislation written directly onto the air itself.

Artisan's Sorrow

Instant

Destroy target artifact or enchantment. 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.)

Some seers read bones or entrails. Others just like to break things.

Artisan of Kozilek

Creature - Eldrazi

When you cast Artisan of Kozilek, you may return target creature card from your graveyard to the battlefield.

Annihilator 2 (Whenever this creature attacks, defending player sacrifices two permanents.)

Artisan of Forms

Creature - Human Wizard

Heroic - Whenever you cast a spell that targets Artisan of Forms, you may have Artisan of Forms become a copy of target creature and gain this ability.

Artillerize

Instant

As an additional cost to cast Artillerize, sacrifice an artifact or creature.

Artillerize deals 5 damage to target creature or player.

Phyrexian or Mirran, most goblins stick to the job they know best.

Artificer's Hex

Enchantment - Aura

Enchant Equipment

At the beginning of your upkeep, if enchanted Equipment is attached to a creature, destroy that creature.

"Some treasures aren't worth finding, let alone stealing."-Dack Fayden

Artful Maneuver

Instant

Target creature gets +2/+2 until end of turn.

Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)

Artful Dodge

Sorcery

Target creature is unblockable this turn.

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Those who know the alleys and sewers of the Erdwal can disappear like smoke.

Arsenal Thresher

Artifact Creature - Construct

As Arsenal Thresher enters the battlefield, you may reveal any number of other artifact cards from your hand. Arsenal Thresher enters the battlefield with a +1/+1 counter on it for each card revealed this way.

Arrows of Justice

Instant

Arrows of Justice deals 4 damage to target attacking or blocking creature.

Archers from the Horizon Military Academy hone their skills by targeting pickpockets blocks away.

Arrow Volley Trap

Instant - Trap

If four or more creatures are attacking, you may pay rather than pay Arrow Volley Trap's mana cost.

Arrow Volley Trap deals 5 damage divided as you choose among any number of target attacking creatures.

Arrow Storm

Sorcery

Arrow Storm deals 4 damage to target creature or player.

Raid - If you attacked with a creature this turn, instead Arrow Storm deals 5 damage to that creature or player and the damage can't be prevented.

First the thunder, then the rain.

Arrogant Bloodlord

Creature - Vampire Knight

Whenever Arrogant Bloodlord blocks or becomes blocked by a creature with power 1 or less, destroy Arrogant Bloodlord at end of combat.

"I would rather take my own head than be thwarted by a presumptuous wretch with a shield and a dream."

Arrest

Enchantment - Aura

Enchant creature

Enchanted creature can't attack or block, and its activated abilities can't be activated.

"We will prove your guilt. We don't arrest the innocent, you know."
-Arrester Lavinia, Tenth Precinct

Army of the Damned

Sorcery

Put thirteen 2/2 black Zombie creature tokens onto the battlefield tapped.

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Sometimes death comes knocking. Sometimes it tears down the walls.

Arms Dealer

Creature - Goblin Rogue

, Sacrifice a Goblin: Arms Dealer deals 4 damage to target creature.

"Guaranteed to leave your enemies sufficiently stabbed, bitten, cleaved, or exploded."
-Grezkrick's Emporium motto

Armory of Iroas

Artifact - Equipment

Whenever equipped creature attacks, put a +1/+1 counter on it.

Equip

From a distance the weapons look pristine, but in fact they are tarnished and dented, each as unique as the champion who carried it to battle.

Armory Guard

Creature - Giant Soldier

Armory Guard has vigilance as long as you control a Gate.

The Dimir agents watched from the shadows. "Eight hours, and I've yet to see him blink," Nefara hissed. "I suggest we find another way in."

Armored Wolf-Rider

Creature - Elf Knight

Wolf-riders of Selesnya apprentice from a young age. Each rider raises a wolf pup from birth to serve as a mount, hoping that one day the two will share the honor of guarding the Great Concourse.

Armored Warhorse

Creature - Horse

"When we of the Northern Verge claim a mount, no peasant's nag will do. It must be as strong as our virtue, and must join us of its own will."
-Sarlena, paladin of the Northern Verge

Armored Transport

Artifact Creature - Construct

Prevent all combat damage that would be dealt to Armored Transport by creatures blocking it.

"If only our jails were as secure."
-Arrester Lavinia, Tenth Precinct

Armored Skaab

Creature - Zombie Warrior

When Armored Skaab enters the battlefield, put the top four cards of your library into your graveyard.

Literally made for battle.

Armored Cancrix

Creature - Crab

Creatures displaced from time still turn up every year, stranded by the temporal disaster that once swept across Dominaria.

Armored Ascension

Enchantment - Aura

Enchant creature

Enchanted creature gets +1/+1 for each Plains you control and has flying.

With skill and strength honed upon the prairie, Naxtil won his battles high above it.

Armistice

Enchantment

: You draw a card and target opponent gains 3 life.

We all must profit for peace to last.
-Mercadian saying

Armillary Sphere

Artifact

, , Sacrifice Armillary Sphere: Search your library for up to two basic land cards, reveal them, and put them into your hand. Then shuffle your library.

The mysterious purpose of two of the rings had eluded Esper mages-until now.

Armed (Armed/Dangerous)

Sorcery

Target creature gets +1/+1 and gains double strike until end of turn.

Fuse (You may cast one or both halves of this card from your hand.)

Armament of Nyx

Enchantment - Aura

Enchant creature

Enchanted creature has double strike as long as it's an enchantment. Otherwise, prevent all damage that would be dealt by enchanted creature. (A creature with double strike deals both first-strike and regular combat damage.)

Armament Master

Creature - Kor Soldier

Other Kor creatures you control get +2/+2 for each Equipment attached to Armament Master.

"We prepare for the known with daggers, rations, rope, and pitons. But we also prepare for the unknown with billycat tails, pikku roots, hedron chips . . ."

Armament Corps

Creature - Human Soldier

When Armament Corps enters the battlefield, distribute two +1/+1 counters among one or two target creatures you control.

The Abzan avoid extended supply lines by incorporating weapons stores into their battle formations.