Whenever another creature you control with power 2 or less enters, Marketwatch Phantom gains flying until end of turn.

Haste

When Markov Warlord enters, up to two target creatures can't block this turn.

Devour 2 (As this enters, you may sacrifice any number of creatures. This creature enters with twice that many +1/+1 counters on it.)

When Marrow Chomper enters, you gain 2 life for each creature it devoured.

All Rats have fear.

, Sacrifice a Rat: Create X 1/1 black Rat creature tokens, where X is the number of Rats you control.

Whenever another Elf you control enters, put a +1/+1 counter on Marwyn, the Nurturer.

: Add an amount of equal to Marwyn's power.

Creatures you control are every creature type. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.

, : Create a 2/2 blue Shapeshifter creature token with changeling. (It is every creature type.)

When Massacre Wurm enters, creatures your opponents control get -2/-2 until end of turn.

Whenever a creature an opponent controls dies, that player loses 2 life.

Protection from red

Elemental creatures you control get +1/+1.

When Master of Waves enters, create a number of 1/0 blue Elemental creature tokens equal to your devotion to blue. (Each in the mana costs of permanents you control counts toward your devotion to blue.)

Draw a card. Master the Way deals damage to any target equal to the number of cards in your hand.

You may have Masterwork of Ingenuity enter as a copy of any Equipment on the battlefield.

Devoid (This card has no color.)

: Maw of Kozilek gets +2/-2 until end of turn. ( represents colorless mana.)

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

Ravenous (This creature enters with X +1/+1 counters on it. If X is 5 or more, draw a card when it enters.)

Terror from the Deep — When Mawloc enters, it fights up to one target creature an opponent controls. If that creature would die this turn, exile it instead.

Whenever an enchanted creature attacks one of your opponents, it gets +2/+0 and gains trample until end of turn.

Whenever an Aura you control is put into your graveyard from the battlefield, exile it. Until the end of your next turn, you may cast that card.

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

Whenever Meandering Towershell attacks, exile it. Return it to the battlefield under your control tapped and attacking at the beginning of the declare attackers step on your next turn.

If a red or artifact source you control would deal damage to an opponent or a permanent an opponent controls, it deals that much damage plus 1 instead.

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.)

Memorial to War enters tapped.

: Add .

, , Sacrifice Memorial to War: Destroy target land.

Put target permanent card from your graveyard on top of your library. (Then exile this card. You may cast the creature later from exile.)

Each attacking creature gets +1/+0 until end of turn for each nonbasic land defending player controls.

Flying

When Merfolk Wayfinder enters, reveal the top three cards of your library. Put all Island cards revealed this way into your hand and the rest on the bottom of your library in any order.

: Target player exiles a card from their graveyard.

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

, : Target creature gets -2/-0 until end of turn. ( is the untap symbol.)

: Target creature gains flying until end of turn.

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

, : Merrow Wavebreakers gains flying until end of turn. ( is the untap symbol.)

Partner with Pippin, Warden of Isengard (When this creature enters, target player may put Pippin into their hand from their library, then shuffle.)

Whenever one or more artifacts you control enter, create a 1/1 white Soldier creature token with lifelink. This ability triggers only once each turn.

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

Meteor Shower deals X plus 1 damage divided as you choose among any number of targets.

(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.

: Target red or white creature gains trample until end of turn. (It can deal excess combat damage to the player or planeswalker it's attacking.)

Intimidate (This creature can't be blocked except by artifact creatures and/or creatures that share a color with it.)

Whenever a Human deals damage to you, destroy it.

Other non-Human creatures you control get +1/+1 and have undying. (When a creature with undying dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)

: Add .

, : Untap target legendary permanent.

Target player discards X cards at random.

Enchant creature

At the beginning of the upkeep of enchanted creature's controller, that player may pay . If they don't, Mind Whip deals 2 damage to that player and you tap that creature.

Join forces — Starting with you, each player may pay any amount of mana. Each player draws X cards, where X is the total amount of mana paid this way.

Counter target spell unless its controller pays . Mindswipe deals X damage to that spell's controller.

All Slivers have ", Sacrifice this permanent: Target player discards a card at random. Activate only as a sorcery."

Flying, trample

When Mindwrack Demon enters, mill four cards.

Delirium — At the beginning of your upkeep, you lose 4 life unless there are four or more card types among cards in your graveyard.

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

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

: You may put a blue or red creature card from your hand onto the battlefield.

Flying, vigilance

When Miner's Guidewing dies, target creature you control explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on that creature, then put the card back or put it into your graveyard.)

Whenever you draw your second card each turn, create a 1/1 blue Illusion creature token with "This creature gets +1/+0 for each other Illusion you control."

Whenever an Illusion you control dies, you may put a permanent card with mana value less than or equal to that creature's power from your hand onto the battlefield.

: Destroy target Aura attached to a creature you control.

: Add .

, , Sacrifice a creature: You gain life equal to the sacrificed creature's toughness.

Flying

Whenever you create or sacrifice a token, each opponent loses 1 life.

Trample

Whenever Mirkwood Elk enters or attacks, return target Elf card from your graveyard to your hand. You gain life equal to that card's power.

Whenever a player attacks you, target attacking creature gets -2/-0 until end of turn.

Whenever a player attacks, if they aren't attacking you, that player chooses an attacking creature. It gets +2/+0 until end of turn.

First strike

Whenever Mirri, Weatherlight Duelist attacks, each opponent can't block with more than one creature this combat.

As long as Mirri, Weatherlight Duelist is tapped, no more than one creature can attack you each combat.

Each other creature becomes a copy of target nonlegendary creature until end of turn.

: The next time damage would be dealt to Mirrorwood Treefolk this turn, that damage is dealt to any target instead.

If a creature an opponent controls would die, exile it instead.

: Misery's Shadow gets +1/+1 until end of turn.