At the beginning of your upkeep, you may say "Ach Hans, run It's the . . ." and the name of a creature card. If you do, search your library for a card with that name, put it onto the battlefield, then shuffle. That creature gains haste. Exile it at the beginning of the next end step.

When A Killer Among Us enters the battlefield, create a 1/1 white Human creature token, a 1/1 blue Merfolk creature token, and a 1/1 red Goblin creature token. Then secretly choose Human, Merfolk, or Goblin.

Sacrifice A Killer Among Us, Reveal the creature type you chose: If target attacking creature token is the chosen type, put three +1/+1 counters on it and it gains deathtouch until end of turn.

As CARDNAME enters the battlefield, you become Abian. (Your life total becomes equal to their loyalty. You can activate the loyalty abilities by spending or gaining life.)

+3: Discard your hand, then draw cards equal to the greatest power among creatures you control.

+1: Create a 3/2 red and green Spirit creature token.

−X: You deal X damage to any target.

Flying

Whenever Abomination of Gudul deals combat damage to a player, you may draw a card. If you do, discard a card.

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

Cumulative upkeep—Put a -1/-1 counter on Aboroth. (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.)

If you would draw a card, you may instead choose land or nonland and reveal cards from the top of your library until you reveal a card of the chosen kind. Put that card into your hand and put all other cards revealed this way on the bottom of your library in any order.

Choose land or nonland. Reveal cards from the top of your library until you reveal a card of the chosen kind. Put that card into your hand and the rest on the bottom of your library in a random order.

At the beginning of your upkeep, draw a card if you control the creature with the greatest toughness or tied for the greatest toughness.

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

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

Target creature gets +X/+X until end of turn, where X is the highest mana value among permanents you control.

Nitro-9 — Whenever Ace, Fearless Rebel attacks, you may sacrifice an artifact. When you do, put a +1/+1 counter on Ace, Fearless Rebel, then it fights up to one target creature defending player controls.

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

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

When Acidic Slime enters the battlefield, destroy target artifact, enchantment, or land.

Commander creatures you own have "The first Dragon spell you cast each turn costs less to cast."

Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Vigilance

When Adaptive Sporesinger enters the battlefield, choose one —

• Target creature gets +2/+2 and gains vigilance until end of turn.

• Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

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

Look at the top five cards of your library. You may reveal a creature card from among them and put it into your hand. Put the rest on the bottom of your library in a random order. If you didn't put a card into your hand this way, draw a card.

At the beginning of your end step, put a +1/+1 counter on target Beast creature you control.

Aerial Volley deals 3 damage divided as you choose among one, two, or three target creatures with flying.

Sacrifice Aerie Ouphes: It deals damage equal to its power to target creature with flying.

Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

You may play an additional land on each of your turns.

Landfall — Whenever a land enters the battlefield under your control, you may draw a card.

When Aether Herder enters the battlefield, you get (two energy counters).

Whenever Aether Herder attacks, you may pay . If you do, create a 1/1 colorless Servo artifact creature token.

At the beginning of your upkeep, discard a card at random. If you discard a creature card this way, return it from your graveyard to the battlefield unless any player pays 5 life.

Trample

When Aetherstream Leopard enters the battlefield, you get (an energy counter).

Whenever Aetherstream Leopard attacks, you may pay . If you do, it gets +2/+0 until end of turn.

Storm (When you cast this spell, copy it for each spell cast before it this turn. Copies become tokens.)

Aeve, Progenitor Ooze isn't legendary if it's a token.

Aeve enters the battlefield with a +1/+1 counter on it for each other Ooze you control.

Afiya Grove enters the battlefield with three +1/+1 counters on it.

At the beginning of your upkeep, move a +1/+1 counter from Afiya Grove onto target creature.

When Afiya Grove has no +1/+1 counters on it, sacrifice it.

Activated abilities of creatures you control cost less to activate, where X is Agatha of the Vile Cauldron's power. This effect can't reduce the mana in that cost to less than one mana.

: Other creatures you control get +1/+1 and gain trample and haste until end of turn.

Whenever you gain life, put that many +1/+1 counters on Ageless Entity.

: Agent of Horizons can't be blocked this turn.

Target creature you control deals damage equal to its power to target creature you don't control.

Target creature gets +1/+1 until end of turn.

Draw a card.

Revolt — At the beginning of your end step, if a permanent you controlled left the battlefield this turn, reveal the top card of your library. If it's a permanent card, you may put it onto the battlefield. Otherwise, you may put it on the bottom of your library.

Ainok Artillerist has reach as long as it has a +1/+1 counter on it. (It can block creatures with flying.)

Megamorph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.)

When Ainok Survivalist is turned face up, destroy target artifact or enchantment an opponent controls.

Whenever Aisling Leprechaun blocks or becomes blocked by a creature, that creature becomes green. <I>(This effect lasts indefinitely.)</I>

+1: Distribute three +1/+1 counters among one, two, or three target creatures you control.

+1: Look at the top four cards of your library. You may reveal an Aura, creature, or planeswalker card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

−8: You gain 100 life.

Creatures you control have vigilance.

+1: You gain 3 life.

−2: Put a +1/+1 counter on each creature you control and a loyalty counter on each other planeswalker you control.

When Ajani's Aid enters the battlefield, you may search your library and/or graveyard for a card named Ajani, Valiant Protector, reveal it, and put it into your hand. If you search your library this way, shuffle.

Sacrifice Ajani's Aid: Prevent all combat damage a creature of your choice would deal this turn.

Descend 4 — As long as there are four or more permanent cards in your graveyard, Akawalli, the Seething Tower gets +2/+2 and has trample.

Descend 8 — As long as there are eight or more permanent cards in your graveyard, Akawalli gets an additional +2/+2 and can't be blocked by more than one creature.

Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

: Regenerate Albino Troll.

Shroud (This creature can't be the target of spells or abilities.)

Whenever another creature dies, you may put a +1/+1 counter on Algae Gharial.

Create a 3/3 green Centaur creature token.

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

You may exile two green cards from your hand rather than pay this spell's mana cost.

Allosaurus Rider's power and toughness are each equal to 1 plus the number of lands you control.

: Until end of turn, target noncreature artifact you control becomes a 4/4 artifact creature.

Trample

: Almighty Brushwagg gets +3/+3 until end of turn.

Trample

When Aloe Alchemist becomes plotted, target creature gets +3/+2 and gains trample until end of turn.

Plot (You may pay and exile this card from your hand. Cast it as a sorcery on a later turn without paying its mana cost. Plot only as a sorcery.)

Menace, trample

When Alpha Deathclaw enters the battlefield or becomes monstrous, destroy target permanent.

: Monstrosity 4. (If this creature isn't monstrous, put four +1/+1 counters on it and it becomes monstrous.)

: Target Kavu creature gets -1/+1 until end of turn.

As an additional cost to cast this spell, sacrifice a creature.

Search your library for a creature card, reveal it, put it into your hand, then shuffle.