Whenever an opponent casts a spell, you have five seconds to choose a keyword you haven't chosen for a card named Modular Monstrosity today that's been printed on a creature card. If you do, Modular Monstrosity gains that ability. Otherwise, Modular Monstrosity loses all keyword abilities.

When another creature enters, sacrifice Mogg Bombers and it deals 3 damage to target player or planeswalker.

Mogg Jailer can't attack if defending player controls an untapped creature with power 2 or less.

Whenever an opponent casts a spell, Mogg Sentry gets +2/+2 until end of turn.

, : Search your library for a Goblin permanent card, put it onto the battlefield, then shuffle.

Enchant creature

Enchanted creature gets +2/-1.

Escape—, Exile two other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)

Bestow (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)

Mogis's Warhound attacks each combat if able.

Enchanted creature gets +2/+2 and attacks each combat if able.

When Moira Brown, Guide Author enters, create a colorless Equipment artifact token named Wasteland Survival Guide with "Equipped creature gets +1/+1 for each quest counter among permanents you control" and equip .

Whenever you attack, put a quest counter on target nonland permanent you control.

Whenever an opponent casts a blue or black spell, you may put a +1/+1 counter on Mold Adder.

Destroy target artifact or enchantment with mana value X. It can't be regenerated. You gain X life.

At the beginning of each player's upkeep, that player sacrifices an artifact.

When you unlock this door, search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)

Enchant creature

Enchanted creature gets +3/+3.

Dredge 2 (If you would draw a card, you may mill two cards instead. If you do, return this card from your graveyard to your hand.)

When Moldgraf Millipede enters, mill three cards, then put a +1/+1 counter on Moldgraf Millipede for each creature card in your graveyard. (To mill three cards, put the top three cards of your library into your graveyard.)

Delirium — Moldgraf Scavenger gets +3/+0 as long as there are four or more card types among cards in your graveyard.

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Molimo, Maro-Sorcerer's power and toughness are each equal to the number of lands you control.

Kicker (You may pay an additional as you cast this spell.)

If this spell was kicked, it has split second. (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.)

Molten Disaster deals X damage to each creature without flying and each player.

Destroy target artifact creature.

Cycling (, Discard this card: Draw a card.)

: Put a +1/+1 counter on Molten Hydra.

, Remove all +1/+1 counters from Molten Hydra: It deals damage to any target equal to the number of +1/+1 counters removed this way.

Devoid (This card has no color.)

Whenever you cast a colorless spell, Molten Nursery deals 1 damage to any target.

Destroy target land. If that land was nonbasic, Molten Rain deals 2 damage to the land's controller.

Choose one or both —

• Molten Rebuke deals 5 damage to target creature or planeswalker.

• Destroy target Equipment.

(: Add or .)

Molten Tributary enters tapped.

( can be paid with either or 2 life.)

Flying

: Moltensteel Dragon gets +1/+0 until end of turn.

Flying

At the beginning of your upkeep, sacrifice Molting Harpy unless you pay .

Target creature gets +2/+2 and gains lifelink until end of turn. (Damage dealt by the creature also causes its controller to gain that much life.)

Look at the top three cards of your library. Put one of those cards into your hand, one into your graveyard, and one on the bottom of your library.

Exile target creature you control, then return it to the battlefield under its owner's control.

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

Whenever you cast a green creature spell, you may search your library for a creature card, reveal it, then shuffle and put that card on top.

Whenever you cast a blue creature spell, reveal the top card of your library. If it's a creature card, put that card into your hand.

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 Monastery Loremaster is turned face up, return target noncreature, nonland card from your graveyard to your hand.

Freerunning (You may cast this spell for its freerunning cost if you dealt combat damage to a player this turn with an Assassin or commander.)

Exile the top two cards of your library. If this spell's freerunning cost was paid, exile the top X cards of your library instead. You may play the exiled cards until the end of your next turn.

Haste

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

At the beginning of each upkeep, if no spells were cast last turn, transform Mondronen Shaman.

, Say your middle name: Moniker Mage gains shroud until end of turn.

, Say an opponent's middle name: Moniker Mage gains flying until end of turn.

When Monk Realist enters, destroy target enchantment.

, : You may put a creature card from your hand onto the battlefield.

When Monstrosity of the Lake enters, you may pay . If you do, tap all creatures your opponents control, then put a stun counter on each of those creatures. (If a permanent with a stun counter would become untapped, remove one from it instead.)

Islandcycling (, Discard this card: Search your library for an Island card, reveal it, put it into your hand, then shuffle.)

As an additional cost to cast this spell, choose a creature you control or reveal a creature card from your hand.

Monstrous Emergence deals damage equal to the power of the creature you chose or the card you revealed to target creature.

Monstrous Hound can't attack unless you control more lands than defending player.

Monstrous Hound can't block unless you control more lands than attacking player.

Target creature gets +2/+0 until end of turn. Create a Monster Role token attached to it. (If you control another Role on it, put that one into the graveyard. Enchanted creature gets +1/+1 and has trample.)

Whenever you cast a creature spell with power 5 or greater, discover X, where X is that spell's mana value. (Exile cards from the top of your library until you exile a nonland card with that mana value or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)

, : Search your library for a basic, Sphere, or Locus land card, reveal it, put it into your hand, then shuffle.

: Monument to Perfection becomes a 9/9 Phyrexian Construct artifact creature, loses all abilities, and gains indestructible and toxic 9. Activate only if there are nine or more lands with different names among the basic, Sphere, and Locus lands you control.

Undergrowth — When Moodmark Painter enters, target creature gains menace and gets +X/+0 until end of turn, where X is the number of creature cards in your graveyard. (It can't be blocked except by two or more creatures.)

Flying

Ninjutsu (, 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, you may draw a card. If you do, discard a card unless Moon-Circuit Hacker entered this turn.

Sacrifice Moonglove Extract: It deals 2 damage to any target.

Look at the top five cards of your library. For each card, put that card into your graveyard unless you pay 2 life. Then put the rest into your hand.

When Moonlit Scavengers enters, if you control an artifact or enchantment, return target creature an opponent controls to its owner's hand.

First strike

Ward—Pay 3 life.

Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)