At the beginning of each upkeep, if a player cast two or more spells last turn, transform Merciless Predator.

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.

Whenever a creature you control explores, Merfolk Cave-Diver gets +1/+0 until end of turn and can't be blocked this turn.

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

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, 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.)

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.

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.")

When Merry Bards enters, you may pay . When you do, create a Young Hero Role token attached to target creature you control. (If you control another Role on it, put that one into the graveyard. Enchanted creature has "Whenever this creature attacks, if its toughness is 3 or less, put a +1/+1 counter on it.")

Visit — Creatures you control with power 2 or less gain horsemanship until end of turn. (They can't be blocked except by creatures with horsemanship.)

Lights — 2, 6

When Mesmeric Fiend enters, 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.

Enchant creature

When Mesmerizing Dose enters, 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.

Enchant creature

Enchanted creature has trample and haste.

Whenever Miara, Thorn of the Glade or another Elf you control dies, you may pay and 1 life. If you do, draw a card.

Partner (You can have two commanders if both have partner.)

Whenever a source an opponent controls deals damage to you, that player sacrifices a permanent of your choice.

When Midnight Arsonist enters, destroy up to X target artifacts without mana abilities, where X is the number of Vampires you control.

Wither (This deals damage to creatures in the form of -1/-1 counters.)

At the beginning of your upkeep, put a -1/-1 counter on each nonblack creature.

: Add .

: Put an hour counter on Midnight Clock.

At the beginning of each upkeep, put an hour counter on Midnight Clock.

When the twelfth hour counter is put on Midnight Clock, shuffle your hand and graveyard into your library, then draw seven cards. Exile Midnight Clock.

Midnight Entity — Whenever Midnight Crusader Shuttle attacks, defending player faces a villainous choice — That player sacrifices a creature of their choice, or you gain control of a creature of your choice that player controls until end of turn. If you gain control of a creature this way, tap it, and it's attacking that player.

Crew 2

Other Aetherborn you control get +1/+1.

Whenever Midnight Entourage or another Aetherborn you control dies, you draw a card and you lose 1 life.

Create two 1/1 white Spirit creature tokens with flying.

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.

Whenever a nontoken creature you control dies, this creature deals 1 damage to you and you draw a card.

Exile X target creature cards from your graveyard. For each creature card exiled this way, create a 2/2 black Zombie creature token.

Raid — At the beginning of your end step, if you attacked this turn, create a Food token. (It's an artifact with ", , Sacrifice this token: You gain 3 life.")

, Sacrifice this enchantment: Target opponent loses X life, where X is the amount of life you gained this turn.

When Midvast Protector enters, target creature you control gains protection from the color of your choice until end of turn.

Target creature gets +2/+2 until end of turn. If you cast this spell during your main phase, that creature gets +4/+4 until end of turn instead.

Whenever Mijae Djinn attacks, flip a coin. If you lose the flip, remove Mijae Djinn from combat and tap it.

: This creature becomes a Werewolf. Put two +1/+1 counters on it and you draw a card. Activate only once.

Whenever a nontoken creature you control attacks, you may pay . If you do, create a 1/1 white Kithkin Soldier creature token that's tapped and attacking.

, : Target creature with power X or less can't be blocked this turn.

Counter target spell. That spell's controller reveals their hand, then discards each card with the same name as a card spliced onto that spell.

Aftermath (Cast this spell only from your graveyard. Then exile it.)

Draw two cards.

Each player may discard up to three cards. Mind Bomb deals damage to each player equal to 3 minus the number of cards they discarded this way.

When Mind Carver enters, attach it to target creature you control.

Equipped creature gets +1/+0. It gets +3/+1 instead as long as an opponent has eight or more cards in their graveyard.

Equip

Target opponent discards two cards, mills a card, and loses 1 life. You gain 1 life. (To mill a card, a player puts the top card of their library into their graveyard.)

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.

Target opponent reveals cards from the top of their library until four land cards are revealed. That player puts all cards revealed this way into their graveyard.

Each opponent reveals cards from the top of their library until they reveal X land cards, then puts all cards revealed this way into their graveyard. X can't be 0.

Target opponent discards a card at random.

Discard a card: You may tap or untap target artifact, creature, or land.

Target player discards two cards.

Overload (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

Target player discards a card.

Draw a card at the beginning of the next turn's upkeep.

Target opponent mills seven cards.

, Sacrifice a creature: Target opponent reveals their hand. You choose a card from it. That player discards that card. Activate only as a sorcery.

Target opponent reveals each noncreature, nonland card in their hand. You choose a card revealed this way. That player discards that card. You lose 2 life. If they didn't reveal a card this way, you draw a card.

Draw X cards.

If you control a Swamp, you may sacrifice a creature rather than pay this spell's mana cost.

Each player exiles two cards from their hand.

At the beginning of your upkeep, put a lore counter on Mind Unbound, then draw a card for each lore counter on Mind Unbound.

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.