Heroic — Whenever you cast a spell that targets Arena Athlete, target creature an opponent controls can't block this turn.

When Arena Rector dies, you may exile it. If you do, search your library for a planeswalker card, put it onto the battlefield, then shuffle your library.

, Sacrifice an enchantment: Destroy target enchantment.

: Counter target enchantment spell.

Flying

Metalcraft — : Exile Argent Sphinx. Return it to the battlefield under your control at the beginning of the next end step. Activate this ability only if you control three or more artifacts.

, : Return target artifact card from your graveyard to your hand.

Return target artifact or enchantment card from your graveyard to your hand.

: Untap two target lands.

Argothian Pixies can't be blocked by artifact creatures.

Prevent all damage that would be dealt to Argothian Pixies by artifact creatures.

Prevent all damage that would be dealt to Argothian Treefolk by artifact sources.

, Pay 2 life: Draw a card.

At the beginning of your upkeep, if you have 5 or less life, you may transform Arguel's Blood Fast.

, Pay 1 life, Sacrifice Arid Mesa: Search your library for a Mountain or Plains card, put it onto the battlefield, then shuffle your library.

Arixmethes, Slumbering Isle enters the battlefield tapped with five slumber counters on it.

As long as Arixmethes has a slumber counter on it, it's a land. (It's not a creature.)

Whenever you cast a spell, you may remove a slumber counter from Arixmethes.

: Add .

, , Sacrifice Ark of Blight: Destroy target land.

+1: Creatures you control get +1/+1 and gain trample until end of turn.

−1: Arlinn, Embraced by the Moon deals 3 damage to any target. Transform Arlinn, Embraced by the Moon.

−6: You get an emblem with "Creatures you control have haste and ‘: This creature deals damage equal to its power to any target.'"

Arlinn's Wolf can't be blocked by creatures with power 2 or less.

Trample

When Armada Wurm enters the battlefield, create a 5/5 green Wurm creature token with trample.

Destroy all lands.

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

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.)

Armed Response deals damage to target attacking creature equal to the number of Equipment you control.

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

You may cast Armor of Thorns as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step.

Enchant nonblack creature

Enchanted creature gets +2/+2.

, Sacrifice Armor Thrull: Put a +1/+2 counter on target creature.

Enchant creature

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

Armored Galleon can't attack unless defending player controls an Island.

: Target creature you control gains protection from the color of your choice until end of turn.

: Armored Guardian gains shroud until end of turn. (It can't be the target of spells or abilities.)

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

Whenever Armory Automaton enters the battlefield or attacks, you may attach any number of target Equipment to it. (Control of the Equipment doesn't change.)

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

Equip

Whenever you crank Arms Depot, put two +1/+1 counters on target creature.

Attacking creatures get +2/+0 until end of turn.

Cumulative upkeep (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.)

: Target creature gains flying until end of turn.

Return target creature to its owner's hand.

Addendum — If you cast this spell during your main phase, draw a card.

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

Trample

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.)

If four or more creatures are attacking, you may pay rather than pay this spell's mana cost.

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

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.

Target creature can't be blocked this turn.

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

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.)

Counter target artifact spell.

Enchant artifact

Whenever enchanted artifact becomes tapped or a player activates an ability of enchanted artifact without in its activation cost, Artifact Possession deals 2 damage to that artifact's controller.

Flying

Whenever you cast a historic spell, scry 1. (Artifacts, legendaries, and Sagas are historic. To scry 1, look at the top card of your library, then you may put that card on the bottom of your library.)

Enchant Equipment

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

Change the text of target spell or permanent by replacing all instances of one creature type with another. The new creature type can't be Wall. (This effect lasts indefinitely.)

Heroic — Whenever you cast a spell that targets Artisan of Forms, you may have Artisan of Forms become a copy of target creature, except it has this ability.

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.)

Vigilance

, : Create a 2/2 white Knight creature token with vigilance.

, , Tap X untapped Knights you control: Destroy target creature with power X or less.

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

Other black creatures get +1/+1.

Nonblack creatures get -1/-1.