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

Search your library for a card with the same name as target nontoken creature, put that card onto the battlefield, then shuffle.

Each other creature you control enters with a number of additional +1/+1 counters on it equal to Master Biomancer's power and as a Mutant in addition to its other types.

, Sacrifice another creature: Add . Spend this mana only to cast Vampire, Cleric, and/or Demon spells.

Target creature gets +1/+1 and gains flying until end of turn.

Jump-start (You may cast this card from your graveyard by discarding a card in addition to paying its other costs. Then exile this card.)

: Add .

: Untap target attacking creature with shadow. Prevent all combat damage that would be dealt to and dealt by that creature this turn.

At the beginning of combat on your turn, put your choice of a +1/+1, first strike, vigilance, or menace counter on Me, the Immortal.

Counters remain on Me as it moves to any zone other than a player's hand or library.

You may cast Me from your graveyard by discarding two cards in addition to paying its other costs.

: Add .

: Add one mana of any color. Spend this mana only to cast a Pilot or Vehicle spell.

, : Target Vehicle becomes an artifact creature until end of turn.

Exile the top ten cards of your library. You may cast spells with exactly three colors from among them this turn. Add . Spend this mana only to cast spells with exactly three colors.

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.

Memorial to Folly enters tapped.

: Add .

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

Memorial to Glory enters tapped.

: Add .

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

Memorial to War enters tapped.

: Add .

, , Sacrifice Memorial to War: Destroy target land.

: Add one mana of any one color. Spend this mana only to cast a creature spell.

Whenever you cast a creature spell that doesn't share a creature type with a creature card in your library, draw a card.

Mercadian Bazaar enters tapped.

: Put a storage counter on Mercadian Bazaar.

, Remove any number of storage counters from Mercadian Bazaar: Add for each storage counter removed this way.

Tap an untapped nontoken artifact you control: Add .

Tap two untapped nontoken artifacts you control: Exile the top card of your library. You may play it this turn.

: Reveal any number of artifact cards in your hand. Add for each card revealed this way.

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

Add X mana of any one color, where X is 1 plus the sacrificed creature's mana value. Spend this mana only to cast creature spells.

When Meteorite enters, it deals 2 damage to any target.

: Add one mana of any color.

(Transforms from Path of Mettle.)

: Add one mana of any color.

, : Metzali, Tower of Triumph deals 2 damage to each opponent.

, : Choose a creature at random that attacked this turn. Destroy that creature.

As an additional cost to cast this spell, sacrifice X Contraptions.

Assemble X plus one Contraptions. (To assemble a Contraption, put the top card of your Contraption deck face up onto one of your sprockets.)

Midnight Oil enters with seven hour counters on it.

At the beginning of your draw step, draw an additional card and remove two hour counters from Midnight Oil.

Your maximum hand size is equal to the number of hour counters on Midnight Oil.

Whenever you discard a card, you lose 1 life.

Enchant artifact

When Mightstone's Animation enters, draw a card.

Enchanted artifact is a creature with base power and toughness 4/4 in addition to its other types.

, Mill a card: Add . (To mill a card, put the top card of your library into your graveyard.)

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

, Return a land you control to its owner's hand: Target creature gains trample until end of turn.

Minas Morgul, Dark Fortress enters tapped.

: Add .

, : Put a shadow counter on target creature. For as long as that creature has a shadow counter on it, it's a Wraith in addition to its other types. (A creature with shadow can block or be blocked by only creatures with shadow.)

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

Target player reveals their hand and discards all cards of each of the sacrificed creature's colors.

Buyback (You may pay an additional as you cast this spell. If you do, put this card into your hand as it resolves.)

Target player discards a card.

Flying

Whenever Mindlink Mech becomes crewed for the first time each turn, until end of turn, Mindlink Mech becomes a copy of target nonlegendary creature that crewed it this turn, except it's 4/3, it's a Vehicle artifact in addition to its other types, and it has flying.

Crew 1

Mines of Moria enters tapped unless you control a legendary creature.

: Add .

, , Exile three cards from your graveyard: Create two Treasure tokens.

When Minsc, Beloved Ranger enters, create Boo, a legendary 1/1 red Hamster creature token with trample and haste.

: Until end of turn, target creature you control has base power and toughness X/X and becomes a Giant in addition to its other types. Activate only as a sorcery.

Creatures you control get +1/+1.

Whenever you tap a land for mana, add one mana of any type that land produced.

: Add .

: Add one mana of any color. Activate only if Mirrex entered this turn.

, : Create a 1/1 colorless Phyrexian Mite artifact creature token with toxic 1 and "This creature can't block." (Players dealt combat damage by it also get a poison counter.)

As Mirror of the Forebears enters, choose a creature type.

: Until end of turn, Mirror of the Forebears becomes a copy of target creature you control of the chosen type, except it's an artifact in addition to its other types.

Reflect (As this enters the battlefield, each opponent may pay . When they do, they create a token copy of this except it lacks this ability.)

, Exile CARDNAME: Add three mana of any one color.

Mirrorpool enters tapped.

: Add .

, , Sacrifice Mirrorpool: Copy target instant or sorcery spell you control. You may choose new targets for the copy.

, , Sacrifice Mirrorpool: Create a token that's a copy of target creature you control.

Haste

, , Discard a card: Draw a card.

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

: Add .

: Mishra's Foundry becomes a 2/2 Assembly-Worker artifact creature until end of turn. It's still a land.

, : Target attacking Assembly-Worker gets +2/+2 until end of turn.

Flash

When Misleading Signpost enters during the declare attackers step, you may reselect which player or permanent target attacking creature is attacking. (It can't attack its controller or their permanents.)

: Add .

: Add .

(: Add .)

Mistveil Plains enters tapped.

, : Put target card from your graveyard on the bottom of your library. Activate only if you control two or more white permanents.

When you unlock this door, create an X/X blue Spirit creature token with flying, where X is the number of unlocked doors among Rooms you control.

(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.)

Flying

You may have Mockingbird enter as a copy of any creature on the battlefield with mana value less than or equal to the amount of mana spent to cast Mockingbird, except it's a Bird in addition to its other types and it has flying.

: Add .

: Add or . Mogg Hollows doesn't untap during your next untap step.

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

When Mold Shambler enters, if it was kicked, destroy target noncreature permanent.

Create a token that's a copy of target artifact or creature you control, except it's an artifact in addition to its other types. It gains haste until end of turn. Sacrifice it at the beginning of the next end step.

(: Add or .)

Molten Tributary enters tapped.

As Monastery Siege enters, 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.

Sacrifice a creature or land: Add .

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.

Monumental Henge enters tapped unless you control a Plains.

: Add .

, : Look at the top five cards of your library. You may reveal a historic card from among them and put it into your hand. Put the rest on the bottom of your library in a random order. (Artifacts, legendaries, and Sagas are historic.)