, Sacrifice an artifact or another creature: Put a +1/+1 counter on Malevolent Noble.

: Exile Mangara of Corondor and target permanent.

When Manic Scribe enters, each opponent mills three cards.

Delirium — At the beginning of each opponent's upkeep, if there are four or more card types among cards in your graveyard, that player mills three cards.

When Manifestation Sage enters, create a 0/0 green and blue Fractal creature token. Put X +1/+1 counters on it, where X is the number of cards in your hand.

Marang River Prowler can't block and can't be blocked.

You may cast Marang River Prowler from your graveyard as long as you control a black or green permanent.

Maraxus of Keld's power and toughness are each equal to the number of untapped artifacts, creatures, and lands you control.

Menace, deathtouch

Whenever Marchesa, Resolute Monarch attacks, remove all counters from up to one target permanent.

At the beginning of your upkeep, if you haven't been dealt combat damage since your last turn, you draw a card and you lose 1 life.

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Dethrone (Whenever this creature attacks the player with the most life or tied for most life, put a +1/+1 counter on it.)

Dethrone (Whenever this creature attacks the player with the most life or tied for most life, put a +1/+1 counter on it.)

: Target creature you control gains haste until end of turn and can't be blocked this turn.

Raid — When Mardu Heart-Piercer enters, if you attacked this turn, Mardu Heart-Piercer deals 2 damage to any target.

Whenever Mardu Shadowspear attacks, each opponent loses 1 life.

Dash (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.)

Whenever Mardu Strike Leader attacks, create a 2/1 black Warrior creature token.

Dash (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.)

When Marina Vendrell enters, reveal the top seven cards of your library. Put all enchantment cards from among them into your hand and the rest on the bottom of your library in a random order.

: Lock or unlock a door of target Room you control. Activate only as a sorcery.

Fabricate 3 (When this creature enters, put three +1/+1 counters on it or create three 1/1 colorless Servo artifact creature tokens.)

Whenever an artifact you control is put into a graveyard from the battlefield, target opponent loses life equal to Marionette Master's power.

Woman Who Walked the Earth — When Martha Jones enters, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

Whenever you sacrifice a Clue, Martha Jones and up to one other target creature can't be blocked this turn.

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

When Martyr for the Cause dies, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

, Reveal X black cards from your hand, Sacrifice Martyr of Bones: Exile up to X target cards from a single graveyard.

, Reveal X white cards from your hand, Sacrifice Martyr of Sands: You gain three times X life.

As long as Martyrs of Korlis is untapped, all damage that would be dealt to you by artifacts is dealt to Martyrs of Korlis instead.

Haste

: Draw a card, then discard a card.

Whenever you discard an Island, Pirate, or Vehicle card, create a tapped Treasure token.

Flash (You may cast this spell any time you could cast an instant.)

: Masked Blackguard gets +1/+1 until end of turn.

Menace

Creatures you control have wither. (They deal damage to creatures in the form of -1/-1 counters.)

Whenever a creature an opponent controls dies, if its toughness was less than 1, draw a card.

Tap an untapped Cleric you control: Prevent the next 2 damage that would be dealt to any target this turn.

: Prevent the next 4 damage that would be dealt to any target this turn.

Whenever Master of Diversion attacks, tap target creature defending player controls.

: Create a 1/1 green Wolf creature token named Wolves of the Hunt. It has "bands with other creatures named Wolves of the Hunt." (Any creatures named Wolves of the Hunt can attack in a band as long as at least one has "bands with other creatures named Wolves of the Hunt." Bands are blocked as a group. If at least two creatures named Wolves of the Hunt you control, one of which has "bands with other creatures named Wolves of the Hunt," are blocking or being blocked by the same creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)

At the beginning of your upkeep, create a 2/2 green Wolf creature token.

: Tap all untapped Wolf creatures you control. Each Wolf tapped this way deals damage equal to its power to target creature. That creature deals damage equal to its power divided as its controller chooses among any number of those Wolves.

When Master Thief enters, gain control of target artifact for as long as you control Master Thief.

Whenever Mastermind Plum attacks, exile up to one target card from a graveyard. If an artifact card was exiled this way, create a Treasure token. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")

Whenever you cast a spell, if mana from a Treasure was spent to cast it, you draw a card and you lose 1 life.

When Maul Splicer enters, create two 3/3 colorless Phyrexian Golem artifact creature tokens.

Golem creatures you control have trample.

Trample

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

When Mausoleum Guard dies, create two 1/1 white Spirit creature tokens with flying.

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

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

As Meddling Kids enters, choose a word with four or more letters.

Spells with the chosen word in their text box can't be cast.

Haste

Whenever you attack with three or more creatures, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

, : The controller of target instant or sorcery spell copies it. That player may choose new targets for the copy.

If you would get one or more poison counters, instead you get one poison counter and you can't get additional poison counters this turn.

Exile Melira, the Living Cure: Choose another target creature or artifact. When it's put into a graveyard this turn, return that card to the battlefield under its owner's control.

, Pay 1 life: Add . Spend this mana only to cast an instant or sorcery spell.

Trample

Melee (Whenever this creature attacks, it gets +1/+1 until end of turn for each opponent you attacked this combat.)

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

Whenever another creature you control with power 2 or less enters, you may pay . If you do, draw a card.

: The next time Mercenaries would deal damage to you this turn, prevent that damage. Any player may activate this ability.

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

, Discard a card: Draw a card.

Merchant Ship can't attack unless defending player controls an Island.

Whenever Merchant Ship attacks and isn't blocked, you gain 2 life.

When you control no Islands, sacrifice Merchant Ship.

, : Draw two cards.

, , Discard a card: Mercurial Chemister deals damage to target creature equal to the discarded card's mana value.

Merieke Ri Berit doesn't untap during your untap step.

: Gain control of target creature for as long as you control Merieke Ri Berit. When Merieke Ri Berit leaves the battlefield or becomes untapped, destroy that creature. It can't be regenerated.

Flying

When Mesa Cavalier enters, you gain 2 life.

Cards in the winning deck(s) of the latest Mythic Championship cost more to cast.

Lifelink

When Metamorphosis Fanatic enters, return up to one target creature card from your graveyard to the battlefield with a lifelink counter on it.

Miracle (You may cast this card for its miracle cost when you draw it if it's the first card you drew this turn.)