: Target creature blocks Matsu-Tribe Decoy this turn if able.

Whenever Matsu-Tribe Decoy deals combat damage to a creature, tap that creature and it doesn't untap during its controller's next untap step.

Trample

When Maulfist Revolutionary enters the battlefield or dies, for each kind of counter on target permanent or player, give that permanent or player another counter of that kind.

When Mausoleum Turnkey enters the battlefield, return target creature card of an opponent's choice from your graveyard to your hand.

, : Look at the top five cards of your library. You may put a creature card with power 5 or greater from among them onto the battlefield. Put the rest on the bottom of your library in any order.

Whenever a player sacrifices a permanent, Mayhem Devil deals 1 damage to any target.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.)

I — Scry 2.

II — Choose a card name.

III — When you cast a spell with the chosen name for the first time this turn, draw two cards.

IV — Look at the top card of each player's library.

You can't get poison counters.

Creatures you control can't have -1/-1 counters put on them.

Creatures your opponents control lose infect.

Memorial to Glory enters the battlefield tapped.

: Add .

, , Sacrifice Memorial to Glory: Create two 1/1 white Soldier creature tokens.

Aftermath (Cast this spell only from your graveyard. Then exile it.)

Each player shuffles their hand and graveyard into their library, then draws seven cards.

Buyback costs cost less.

Whenever an opponent casts a spell, that player mills two cards.

Counter target spell. If that spell is countered this way, put it on top of its owner's library instead of into that player's graveyard.

You may cast target instant or sorcery card from an opponent's graveyard without paying its mana cost.

Target opponent reveals their hand. You choose a nonland card from it. That player discards that card. You may put a card that has an Adventure that player owns from exile into that player's graveyard.

Target player discards two cards and loses 2 life.

When Mercenary Knight enters the battlefield, sacrifice it unless you discard a creature card.

Flying

When Merfolk Skydiver enters the battlefield, put a +1/+1 counter on target creature you control.

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

Islandwalk (This creature can't be blocked as long as defending player controls an Island.)

Whenever Merfolk Spy deals combat damage to a player, that player reveals a card at random from their hand.

Other Merfolk creatures you control get +1/+1.

Whenever you cast a Merfolk spell, you may tap or untap target permanent.

Counter target spell with converted mana cost 3 or less. (Then exile this card. You may cast the creature later from exile.)

Gain control of target artifact until end of turn. Untap that artifact. It gains haste until end of turn.

Return target creature card from your graveyard to your hand.

Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)

Whenever a creature with power 5 or greater enters the battlefield under your control, you may put two +1/+1 counters on it.

Mutate (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

Whenever this creature mutates, search your library for a basic land card, put it onto the battlefield tapped, then shuffle your library.

Whenever you attack with two or more creatures, draw a card.

Flying

When Mindeye Drake dies, target player mills five cards.

Flying

At the beginning of combat on your turn, each player mills three cards.

Return target creature card from your graveyard to the battlefield. Put a +1/+1 counter on it.

Flying

Whenever you cast an artifact spell, you may untap target creature.

The "legend rule" doesn't apply.

Up to two target creatures each get +4/+4 until end of turn.

Whenever you cast an artifact spell, you may search your graveyard, hand, and/or library for a card with the same name as that spell and put it onto the battlefield. If you search your library this way, shuffle it.

This spell can't be countered.

Haste, protection from blue

Mistcutter Hydra enters the battlefield with X +1/+1 counters on it.

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

Whenever Mist-Syndicate Naga deals combat damage to a player, create a token that's a copy of Mist-Syndicate Naga.

Exile target card that's an instant or sorcery from your graveyard. For each card exiled this way, copy it, and you may cast the copy without paying its mana cost. Exile Mizzix's Mastery.

Overload (You may cast this spell for its overload cost. If you do, change its text by replacing all instances of "target" with "each.")

Enchant creature

Enchanted creature has trample.

Whenever all non-Wall creatures you control attack, enchanted creature gets +X/+0 until end of turn, where X is the number of attacking creatures.

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.

Mogg Toady can't attack unless you control more creatures than defending player.

Mogg Toady can't block unless you control more creatures than attacking player.

: 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.

Each player shuffles the cards from their hand into their library, then draws that many cards.

Metalcraft — If you control three or more artifacts, Molten Psyche deals damage to each opponent equal to the number of cards that player has drawn this turn.

Flying

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

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

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.

As Monastery Siege enters the battlefield, choose Khans or Dragons.

• Khans — At the beginning of your draw step, draw an additional card, then discard a card.

• Dragons — Spells your opponents cast that target you or a permanent you control cost more to cast.

Whenever a nontoken creature you control dies,

Augment (, Reveal this card from your hand: Combine it with target host. Augment only as a sorcery.)

As Monkey Monkey Monkey enters the battlefield, choose a letter.

Monkey Monkey Monkey gets +1/+1 for each nonland permanent whose name begins with the chosen letter.

Trample

Each creature you control gets +1/+0 for each time it has attacked this turn.

Landfall — Whenever a land enters the battlefield under your control, if it's your main phase, there's an additional combat phase after this phase. At the beginning of that combat, untap all creatures you control.

Enchant creature you control

Enchanted creature gets +1/+1.

Whenever enchanted creature deals combat damage to a player, you may sacrifice Mortal Obstinacy. If you do, destroy target enchantment.

Whenever a creature is put into your graveyard from the battlefield, put that card on top of your library.