When Memory Test enters the battlefield, target opponent exiles cards from the bottom of their library until they exile five nonland cards, then turns those cards face down.

Visit — Name the exiled nonland cards, then look at the exiled cards. If you named them correctly, claim the prize

Prize — Create three 1/1 red Balloon creature tokens with flying, then sacrifice Memory Test and open an Attraction.

Lights — 5, 6

Target player shuffles up to three target cards from their graveyard into their library.

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

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

( can be paid with either or 2 life.)

Counter target spell with mana value 1.

Flying

When Mentor of Evos Isle enters the battlefield, choose a creature card in your hand. It perpetually gains flying.

Flying

Each creature you control is a Vampire in addition to its other creature types and has "Whenever this creature deals damage to a creature, put a +1/+1 counter on this creature."

Mephit's Enthusiasm deals 4 damage to target creature or planeswalker. If excess damage was dealt this way, note that excess damage, then you get a boon with "When you cast your next creature spell, it perpetually gets +X/+0, where X is the noted number."

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

When Merchant of Secrets enters the battlefield, draw a card.

Search your library for a blue instant card, reveal that card, put it into your hand, then shuffle.

, , 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.

Choose one —

• Exile all artifacts.

• Exile all creatures.

• Exile all enchantments.

• Exile all planeswalkers.

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

Exile target creature. Incubate 3. (Create an Incubator token with three +1/+1 counters on it and ": Transform this artifact." It transforms into a 0/0 Phyrexian artifact creature.)

, : Draw two cards.

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

Mercurial Spelldancer can't be blocked.

Whenever you cast a noncreature spell, put an oil counter on Mercurial Spelldancer.

Whenever Mercurial Spelldancer deals combat damage to a player, you may remove two oil counters from it. If you do, when you next cast an instant or sorcery spell this turn, copy that spell. You may choose new targets for the copy.

: Destroy target creature with islandwalk.

, : Target player mills two cards.

When Merfolk Observer enters the battlefield, look at the top card of target player's library.

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

Phasing (This phases in or out before you untap during each of your untap steps. While it's phased out, it's treated as though it doesn't exist.)

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.)

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

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

: Switch target creature's power and toughness until end of turn.

Flash

When Merfolk Trickster enters the battlefield, tap target creature an opponent controls. It loses all abilities until end of turn.

Reach

Domain — When Meria's Outrider enters the battlefield, it deals damage to each opponent equal to the number of basic land types among lands you control.

When Merrow Witsniper enters the battlefield, target player mills a card.

Haste

Merry, Esquire of Rohan has first strike as long as it's equipped.

Whenever you attack with Merry and another legendary creature, draw a card.

Enchant creature

Merseine enters the battlefield 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.

Stand up, Flap your arms, Cluck like a chicken: Mesa Chicken gains flying until end of turn.

Flying

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

Flying; banding (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)

When Mesmeric Fiend enters the battlefield, target opponent reveals their hand and you choose a nonland card from it. Exile that card.

When Mesmeric Fiend leaves the battlefield, return the exiled card to its owner's hand.

Whenever a permanent becomes untapped, that permanent's controller mills a card.

Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

, Discard a card: Draw a card.

Enchant creature

When Mesmerizing Dose enters the battlefield, tap enchanted creature, then proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Enchanted creature doesn't untap during its controller's untap step.

Flying

When Messenger Falcons enters the battlefield, draw a card.

Enchant creature

Enchanted creature has trample and haste.

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

Whenever you cast an instant or sorcery spell, create an X/X colorless Construct artifact creature token, where X is that spell's mana value.

, Exile Metallurgic Summonings: Return all instant and sorcery cards from your graveyard to your hand. Activate only if you control six or more artifacts.

This spell costs less to cast, where X is the total mana value of noncreature artifacts you control.

Sacrifice two artifacts: Return Metalwork Colossus from your graveyard to your hand.

Put target permanent an opponent controls on top of its owner's library. That opponent may put an artifact, creature, enchantment, or land card from their hand onto the battlefield.

Flying

: You may put a creature card with mana value X from your hand onto the battlefield. If you do, return Metathran Aerostat to its owner's hand.

Flying

Metathran Transport can't be blocked by blue creatures.

: Target creature becomes blue until end of turn.

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

Meteor Swarm deals 8 damage divided as you choose among X target creatures and/or planeswalkers.

: 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, vigilance

You have hexproof.

Whenever Metropolis Reformer is dealt damage, you gain that much life.

When Miasmic Mummy enters the battlefield, each player discards a card.