Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for .)

When Maverick Thopterist enters, create two 1/1 colorless Thopter artifact creature tokens with flying.

Whenever one or more nontoken Vampires you control attack, create a 1/1 white Vampire creature token with lifelink.

Destroy target land. You gain 4 life.

Target creature gets +1/+1 and gains haste 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.)

At the beginning of your upkeep, put a +1/+1 counter on each creature you control if you control a creature with power 5 or greater. Then you gain 10 life if you control a creature with power 10 or greater. Then you win the game if you control a creature with power 20 or greater.

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

Multicolored creatures you control have deathtouch.

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

, Put a page counter on Mazemind Tome: Scry 1.

, , Put a page counter on Mazemind Tome: Draw a card.

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

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.

Meandering River enters tapped.

: Add or .

At the beginning of your end step, sacrifice Measure of Wickedness and you lose 8 life.

Whenever another card is put into your graveyard from anywhere, target opponent gains control of Measure of Wickedness.

When Meathook Massacre II enters, each player sacrifices X creatures.

Whenever a creature you control dies, you may pay 3 life. If you do, return that card under your control with a finality counter on it.

Whenever a creature an opponent controls dies, they may pay 3 life. If they don't, return that card under your control with a finality counter on it.

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.

As Meddling Kids enters, choose a word with four or more letters.

Spells with the chosen word in their text box can't be cast.

Haste

Whenever you attack with three or more creatures, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

When Medicine Runner enters, you may remove a counter from target permanent.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)

You gain 8 life.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.)

I — Scry 2.

II — Choose a card name.

III — When you cast a spell with the chosen name for the first time this turn, draw two cards.

IV — Look at the top card of each player's library.

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.

Trample

When Megatherium enters, sacrifice it unless you pay for each card in your hand.

Whenever an opponent discards a card, Megrim deals 2 damage to that player.

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.)

Flying, protection from black

, : The controller of target instant or sorcery spell copies it. That player may choose new targets for the copy.

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.

Flying

, Return a land you control to its owner's hand: Create a 1/1 blue Illusion creature token with flying.

All lands are no longer snow.

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.

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

Each player shuffles their hand and graveyard into their library, then draws seven cards.

Whenever an opponent casts a spell, that player mills two cards.

Target player mills four cards.

Conspire (As you cast this spell, you may tap two untapped creatures you control that share a color with it. When you do, copy it and you may choose a new target for the copy.)

Trample, haste

When Menacing Ogre enters, each player secretly chooses a number. Then those numbers are revealed. Each player with the highest number loses that much life. If you are one of those players, put two +1/+1 counters on Menacing Ogre.

Trample

Melee (Whenever this creature attacks, it gets +1/+1 until end of turn for each opponent you attacked this combat.)

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

Flying

Whenever Meneldor, Swift Savior deals combat damage to a player, exile up to one target creature you own, then return it to the battlefield under your control.

, Discard a card: Draw a card.

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."

Mephitic Ooze gets +1/+0 for each artifact you control.

Whenever Mephitic Ooze deals combat damage to a creature, destroy that creature. The creature can't be regenerated.

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."

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.

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

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.

Whenever Merchant Raiders or another Pirate you control enters, tap up to one target creature. That creature doesn't untap during its controller's untap step for as long as you control Merchant Raiders.

Afflict 2 (Whenever this creature becomes blocked, defending player loses 2 life.)

, Discard a card: Merciless Eternal gets +2/+2 until end of turn.

When Merciless Executioner enters, each player sacrifices a creature.

, 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.)