When Alpine Guide enters the battlefield, you may search your library for a Mountain card, put that card onto the battlefield tapped, then shuffle.

Alpine Guide attacks each combat if able.

When Alpine Guide leaves the battlefield, sacrifice a Mountain.

When Alpine Houndmaster enters the battlefield, you may search your library for a card named Alpine Watchdog and/or a card named Igneous Cur, reveal them, put them into your hand, then shuffle.

Whenever Alpine Houndmaster attacks, it gets +X/+0 until end of turn, where X is the number of other attacking creatures.

Vigilance

When Alquist Proft, Master Sleuth enters the battlefield, investigate. (Create a Clue token. It’s an artifact with “{2}, Sacrifice this artifact: Draw a card.”)

{X}{W}{U}{U}, {T}, Sacrifice a Clue: You draw X cards and gain X life.

Whenever a creature an opponent controls dies, Altac Bloodseeker gets +2/+0 and gains first strike and haste until end of turn. (It deals combat damage before creatures without first strike, and it can attack and {T} as soon as it comes under your control.)

First strike

Whenever Altaïr Ibn-La'Ahad attacks, exile up to one target Assassin creature card from your graveyard with a memory counter on it. Then for each creature card you own in exile with a memory counter on it, create a tapped and attacking token that’s a copy of it. Exile those tokens at end of combat.

Sacrifice Amateur Auteur: Destroy target enchantment.

When Ambitious Farmhand enters the battlefield, you may search your library for a basic Plains card, reveal it, put it into your hand, then shuffle.

Coven — {1}{W}{W}: Transform Ambitious Farmhand. Activate only if you control three or more creatures with different powers.

Lifelink

Flash

Flying

{5}: Creatures you control get +1/+1 until end of turn.

First strike, haste

{1}, {T}, Discard a card: Draw a card.

Whenever you discard one or more artifact cards, add {R}{R}. This ability triggers only once each turn.

Ninjutsu {U} ({U}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)

Whenever Moon-Circuit Hacker deals combat damage to a player, scry 2, then draw a card. Discard a card unless Moon-Circuit Hacker entered the battlefield this turn.

When Ampryn Tactician enters the battlefield, creatures you control get +1/+1 until end of turn.

Partner with Rory Williams (When this creature enters the battlefield, target player may put Rory into their hand from their library, then shuffle.)

Whenever Amy Pond deals combat damage to a player, choose a suspended card you own and remove that many time counters from it.

Doctor’s companion (You can have two commanders if the other is the Doctor.)

Kicker {2}{U} and/or {1}{B} (You may pay an additional {2}{U} and/or {1}{B} as you cast this spell.)

When Ana Battlemage enters the battlefield, if it was kicked with its {2}{U} kicker, target player discards three cards.

When Ana Battlemage enters the battlefield, if it was kicked with its {1}{B} kicker, tap target untapped creature and that creature deals damage equal to its power to its controller.

{U}, {T}: Target creature gains flying until end of turn.

{B}, {T}: Target creature gets -2/-0 until end of turn.

Whenever Anafenza, the Foremost attacks, put a +1/+1 counter on another target tapped creature you control.

If a nontoken creature an opponent owns would die or a creature card not on the battlefield would be put into an opponent’s graveyard, exile that card instead.

When Anarchist enters the battlefield, you may return target sorcery card from your graveyard to your hand.

First strike, vigilance

Heroic — Whenever you cast a spell that targets Anax and Cymede, creatures you control get +1/+1 and gain trample until end of turn.

First strike (This creature deals combat damage before creatures without first strike.)

When Ancestor’s Chosen enters the battlefield, you gain 1 life for each card in your graveyard.

Tap five untapped Clerics you control: You gain 10 life.

{R}: Angelfire Crusader gets +1/+0 until end of turn.

When Angelheart Protector enters the battlefield, target creature you control gains indestructible until end of turn. (Damage and effects that say “destroy” don’t destroy it.)

{2}{W}, {T}, Sacrifice a green creature, a white creature, and a blue creature: Search your library for a card named Empyrial Archangel, put it onto the battlefield, then shuffle.

If a source you control would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.

Trample

As long as it’s your turn, Angry Mob’s power and toughness are each equal to 2 plus the number of Swamps your opponents control. As long as it’s not your turn, Angry Mob’s power and toughness are each 2.

{G}{W}{U}, {T}: Prevent all combat damage that would be dealt this turn. Activate only before the combat damage step.

An-Havva Constable’s toughness is equal to 1 plus the number of green creatures on the battlefield.

Whenever you attack with one or more non-Gnome creatures, put a +1/+1 counter on Anim Pakal, then create X 1/1 colorless Gnome artifact creature tokens that are tapped and attacking, where X is the number of +1/+1 counters on Anim Pakal.

Flash

When Annie Flash, the Veteran enters the battlefield, if you cast it, return target permanent card with mana value 3 or less from your graveyard to the battlefield tapped.

Whenever Annie Flash becomes tapped, exile the top two cards of your library. You may play those cards this turn.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

{4}{W}: Anointed Chorister gets +3/+3 until end of turn.

Vigilance

As Anointed Peacekeeper enters the battlefield, look at an opponent’s hand, then choose any card name.

Spells your opponents cast with the chosen name cost {2} more to cast.

Activated abilities of sources with the chosen name cost {2} more to activate unless they’re mana abilities.

{T}: Target attacking creature gets +1/+1 until end of turn.

Whenever a creature token enters the battlefield under your control, you gain 1 life.

Embalm {3}{W} ({3}{W}, Exile this card from your graveyard: Create a token that’s a copy of it, except it’s a white Zombie Human Cleric with no mana cost. Embalm only as a sorcery.)

Heroic — Whenever you cast a spell that targets Anthousa, Setessan Hero, up to three target lands you control each become 2/2 Warrior creatures until end of turn. They’re still lands.

Antique Collector can’t be blocked by creatures with power 2 or less.

When Antique Collector enters the battlefield, creatures you control perpetually gain “When this creature dies, you may shuffle it into its owner’s library if it’s in your graveyard. If you do, investigate.”

Menace (This creature can’t be blocked except by two or more creatures.)

Whenever a Samurai or Warrior you control attacks alone, the next spell you cast this turn costs {1} less to cast.

{T}: Untap target artifact or creature.

Morph {U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

Morph {3}{B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

When Aphetto Exterminator is turned face up, target creature gets -3/-3 until end of turn.

Tap two untapped Wizards you control: Tap target permanent.

Whenever a permanent is turned face up, you may draw a card.

Protection from black (This creature can’t be blocked, targeted, dealt damage, enchanted, or equipped by anything black.)

{2}: Exile target card from a graveyard.

Vigilance

Whenever you attack, you create a Food token for each player being attacked. (It’s an artifact with “{2}, {T}, Sacrifice this artifact: You gain 3 life.”)

{W}, {T}, Tap X untapped Foods you control: Create X 1/1 white Human creature tokens.

Reach

Training (Whenever this creature attacks with another creature with greater power, put a +1/+1 counter on this creature.)

{T}: Apprentice Sorcerer deals 1 damage to any target. Activate only during your turn, before attackers are declared.

{U}, {T}: Add {C}{C}{C}.

Ninjutsu {1}{U} ({1}{U}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)

Whenever one or more Ninja or Rogue creatures you control deal combat damage to a player, create a Treasure token. (It’s an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)

Flash

When Psionic Snoop enters the battlefield, it connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on this creature.)

Flying

Bushido 1 (Whenever this creature blocks or becomes blocked, it gets +1/+1 until end of turn.)

Enlist (As this creature attacks, you may tap a nonattacking creature you control without summoning sickness. When you do, add its power to this creature’s until end of turn.)

Whenever a creature you control attacks, if it enlisted a creature this combat, the creature that attacked gains double strike until end of turn. If that creature’s power is 4 or greater, draw a card.

Whenever Radha’s Firebrand attacks, target creature defending player controls with power less than or equal to Radha’s Firebrand’s power can’t block this turn.

Domain — {5}{R}: Radha’s Firebrand gets +2/+2 until end of turn. This ability costs {1} less to activate for each basic land type among lands you control. Activate only once each turn.

Vigilance

Whenever Aragorn and Arwen, Wed enters the battlefield or attacks, put a +1/+1 counter on each other creature you control. You gain 1 life for each other creature you control.

Whenever the Ring tempts you, if you chose a creature other than Aragorn, Company Leader as your Ring-bearer, put your choice of a counter from among first strike, vigilance, deathtouch, and lifelink on Aragorn.

Whenever you put one or more counters on Aragorn, put one of each of those kinds of counters on up to one other target creature.

Attacking creatures you control have first strike and renown 1. (When a creature with renown 1 deals combat damage to a player, if it isn’t renowned, put a +1/+1 counter on it and it becomes renowned.)

Whenever a renowned creature you control deals combat damage to a player, double the number of +1/+1 counters on it.

Vigilance, lifelink

When Aragorn, King of Gondor enters the battlefield, you become the monarch.

Whenever Aragorn attacks, up to one target creature can’t block this turn. If you’re the monarch, creatures can’t block this turn.

Whenever you cast a white spell, create a 1/1 white Human Soldier creature token.

Whenever you cast a blue spell, scry 2.

Whenever you cast a red spell, Aragorn, the Uniter deals 3 damage to target opponent.

Whenever you cast a green spell, target creature gets +4/+4 until end of turn.

First strike

Whenever a Samurai or Warrior you control attacks alone, untap it. If it’s the first combat phase of the turn, there is an additional combat phase after this phase.

When Arashin Cleric enters the battlefield, you gain 3 life.

Double strike

Whenever Arashin Foremost enters the battlefield or attacks, another target Warrior creature you control gains double strike until end of turn.

{2}{W}, {T}: Arbalest Elite deals 3 damage to target attacking or blocking creature. Arbalest Elite doesn’t untap during your next untap step.

When Arbalest Engineers enters the battlefield, choose one —

• Arbalest Engineers deals 1 damage to any target.

• Put a +1/+1 counter on target creature. It gains trample and haste until end of turn.

• Create a tapped Powerstone token. (It’s an artifact with “{T}: Add {C}. This mana can’t be spent to cast a nonartifact spell.”)