Flying

: You may cast target instant or sorcery card from your graveyard this turn. If that spell doesn't target a creature you control, it costs more to cast this way. If that spell would be put into your graveyard, exile it instead. Activate only once each turn. (You still pay the spell's costs. Timing rules for the spell still apply.)

Sacrifice a creature: Creatures you control get +1/+1 until end of turn.

, : 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.

: Add .

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

, Put a page counter on this artifact: Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

, , Put a page counter on this artifact: Draw a card.

When there are four or more page counters on this artifact, exile it. If you do, you gain 4 life.

Meandering River enters tapped.

: Add or .

, Exile Mechtitan Core and four other artifact creatures and/or Vehicles you control: Create Mechtitan, a legendary 10/10 Construct artifact creature token with flying, vigilance, trample, lifelink, and haste that's all colors. When that token leaves the battlefield, return all cards exiled with Mechtitan Core except Mechtitan Core to the battlefield tapped under their owners' control.

Crew 2

, , Discard a card: Regenerate target creature.

Vigilance

Meldweb Strider enters with an oil counter on it.

Remove an oil counter from Meldweb Strider: It becomes an artifact creature until end of turn.

Crew 3 (Tap any number of creatures you control with total power 3 or more: This Vehicle becomes an artifact creature until end of turn.)

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.

: Target permanent becomes an artifact in addition to its other types. (This effect lasts indefinitely.)

: Gain control of target artifact. (This effect lasts indefinitely.)

Memorial to Genius enters tapped.

: Add .

, , Sacrifice Memorial to Genius: Draw two cards.

Memorial to Unity enters tapped.

: Add .

, , Sacrifice Memorial to Unity: Look at the top five cards of your library. You may reveal a creature card from among them and put it into your hand. Then put the rest on the bottom of your library in a random order.

, Sacrifice Memory Jar: Each player exiles all cards from their hand face down and draws seven cards. At the beginning of the next end step, each player discards their hand and returns to their hand each card they exiled this way.

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

: 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.

Draw three cards.

Basic landcycling (, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)

, : Put a winch counter on Mercadian Lift.

, Remove X winch counters from Mercadian Lift: You may put a creature card with mana value X from your hand onto the battlefield.

Mercenary Informer can't be the target of black spells or abilities from black sources.

: Put target nontoken Mercenary on the bottom of its owner's library.

, , Tap X untapped artifacts you control: Look at the top X cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.

, Discard a card: Put a -1/-1 counter on target creature. That creature can't block this turn.

, : Draw two cards.

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

Outlast (, : Put a +1/+1 counter on this creature. Outlast only as a sorcery.)

Each creature you control with a +1/+1 counter on it has deathtouch.

: Merfolk Coralsmith gets +1/-1 until end of turn.

When Merfolk Coralsmith dies, scry 2.

, : Target player mills two cards.

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

: Tap target creature without flying.

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

: Target Merfolk creature can't be blocked this turn.

Flying

Whenever Merfolk Windrobber deals combat damage to a player, that player mills a card. (They put the top card of their library into their graveyard.)

Sacrifice Merfolk Windrobber: Draw a card. Activate only if an opponent has eight or more cards in their graveyard.

Whenever one or more Halflings you control attack a player, create a Food token. (It's an artifact with ", , Sacrifice this artifact: You gain 3 life.")

: Target player exiles a card from their graveyard.

Whenever you cast a black spell, you may untap Merrow Bonegnawer.

: Target creature gains flying until end of turn.

Whenever you cast a blue spell, you may untap Merrow Levitator.

Enchant creature

Merseine enters with three net counters on it.

Enchanted creature doesn't untap during its controller's untap step if Merseine has a net counter on it.

Pay enchanted creature's mana cost: Remove a net counter from Merseine. Only the controller of the enchanted creature may activate this ability.

Flying

: Mesa Falcon gets +0/+1 until end of turn.

, : Regenerate target artifact.

When Metalspinner's Puzzleknot enters, you draw a card and you lose 1 life.

, Sacrifice Metalspinner's Puzzleknot: You draw a card and you lose 1 life.

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

Flying

Metathran Transport can't be blocked by blue creatures.

: Target creature becomes blue until end of turn.

: Choose a color of a permanent you control. Add one mana of that color.

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

: Add one mana of any color.

: Return target permanent you control to its owner's hand. If it has unearth, instead exile it, then return that card to its owner's hand. Activate only during your turn.

Flying

: Metropolis Sprite gets +1/-1 until end of turn.

: Surveil 1.

: Target permanent card in a graveyard becomes a 0/0 black Germ creature in addition to its other colors and types until end of turn. (This effect ends if it leaves the graveyard.)

Enchant creature

Enchanted creature has ": This creature gets +1/+1 until end of turn."

At the beginning of your upkeep, you may put a verse counter on Midsummer Revel.

, Sacrifice Midsummer Revel: Create X 3/3 green Beast creature tokens, where X is the number of verse counters on Midsummer Revel.

Migloz, Maze Crusher enters with five oil counters on it.

, Remove an oil counter from Migloz: It gains vigilance and menace until end of turn.

, Remove two oil counters from Migloz: It gets +2/+2 until end of turn.

, Remove three oil counters from Migloz: Destroy target artifact or enchantment.

Create four 1/1 white Bird creature tokens with flying.

Basic landcycling (, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)

: Add .

, : Each player draws a card.

Vigilance

: Prevent the next 1 damage that would be dealt to any target this turn.

, : Target player mills two cards.

Imprint — Whenever a nontoken creature dies, you may exile that card. If you do, return each other card exiled with Mimic Vat to its owner's graveyard.

, : Create a token that's a copy of a card exiled with Mimic Vat. It gains haste. Exile it at the beginning of the next end step.