Antagonism

At the beginning of each player's end step, this enchantment deals 2 damage to that player unless one of their opponents was dealt damage this turn.

Ancient Runes

At the beginning of each player's upkeep, this enchantment deals damage to that player equal to the number of artifacts they control.

Anger

Haste
As long as this card is in your graveyard and you control a Mountain, creatures you control have haste.

Aether Sting

Whenever an opponent casts a creature spell, this enchantment deals 1 damage to that player.

Accelerate

Target creature gains haste until end of turn.
Draw a card.

Artifact Blast

Acidic Soil

Acidic Soil deals damage to each player equal to the number of lands they control.

Ambush

Blocking creatures gain first strike until end of turn.

Krenko, Mob Boss

{T}: Create X 1/1 red Goblin creature tokens, where X is the number of Goblins you control.

Abrade

Choose one —
• Abrade deals 3 damage to target creature.
• Destroy target artifact.

Apocalypse

Exile all permanents. You discard your hand.

Aggravated Assault

{3}{R}{R}: Untap all creatures you control. After this main phase, there is an additional combat phase followed by an additional main phase. Activate only as a sorcery.