Changeling (This card is every creature type.)

As Morophon, the Boundless enters the battlefield, choose a creature type.

Spells of the chosen type you cast cost less to cast. This effect reduces only the amount of colored mana you pay.

Other creatures you control of the chosen type get +1/+1.

: Untap Morphling.

: Morphling gains flying until end of turn.

: Morphling gains shroud until end of turn. (It can't be the target of spells or abilities.)

: Morphling gets +1/-1 until end of turn.

: Morphling gets -1/+1 until end of turn.

Morselhoarder enters the battlefield with two -1/-1 counters on it.

Remove a -1/-1 counter from Morselhoarder: Add one mana of any color.

At the beginning of your upkeep, if twenty or more creature cards are in your graveyard, you win the game.

Enchant creature

When enchanted creature is dealt damage, destroy it.

Target creature gets +1/+1 and gains lifelink until end of turn. (Damage dealt by the creature also causes its controller to gain that much life.)

Flying

Primarch of the Death Guard — At the beginning of your end step, you may pay . If you do, create X 2/2 black Astartes Warrior creature tokens with menace. X can't be greater than the amount of life you lost this turn.

Whenever a player sacrifices a creature, you may put a +1/+1 counter on Mortician Beetle.

: All creatures able to block Mortipede this turn do so.

Whenever Mortis Dogs attacks, it gets +2/+0 until end of turn.

When Mortis Dogs dies, target player loses life equal to its power.

Whenever a creature is put into your graveyard from the battlefield, put that card on top of your library.

When Mortus Strider dies, return it to its owner's hand.

Moss Diamond enters the battlefield tapped.

: Add .

Trample

When Mossbeard Ancient enters the battlefield, you gain 5 life.

Vigilance

, , Sacrifice Mossfire Egg: Add . Draw a card.

Kicker (You may pay an additional as you cast this spell.)

If Moss-Pit Skeleton was kicked, it enters the battlefield with three +1/+1 counters on it.

Whenever one or more +1/+1 counters are put on a creature you control, if Moss-Pit Skeleton is in your graveyard, you may put Moss-Pit Skeleton on top of your library.

Trample

When Mosswood Dreadknight dies, you may cast it from your graveyard as an Adventure until the end of your next turn.

Flash

Enchant creature

Enchanted creature gets +2/+1.

When enchanted creature dies, create two Treasure tokens.

, Exile Mother Bear from your graveyard: Create two 2/2 green Bear creature tokens. Activate only as a sorcery.

Whenever a creature an opponent controls dies, sacrifice Mother of Goons unless you insult that creature.

This spell costs less to cast if you have no creature cards in hand not named Mothrider Cavalry.

Flying

Other creatures you control get +1/+1.

Flying

Bushido 1 (Whenever this creature blocks or becomes blocked, it gets +1/+1 until end of turn.)

Trample, haste

Whenever Motivated Pony attacks, attacking creatures get +1/+1 until end of turn. If a Food entered the battlefield under your control this turn, untap those creatures and they get an additional +2/+2 until end of turn.

At the beginning of combat on your turn, you may discard a card. When you do, Mount Velus Manticore deals X damage to any target, where X is the number of card types the discarded card has.

Haste

Red legendary creatures you control have "bands with other legendary creatures." (Any legendary creatures can attack in a band as long as at least one has "bands with other legendary creatures." Bands are blocked as a group. If at least two legendary creatures you control, one of which has "bands with other legendary creatures," are blocking or being blocked by the same creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)

Mountain Valley enters the battlefield tapped.

, Sacrifice Mountain Valley: Search your library for a Mountain or Forest card, put it onto the battlefield, then shuffle.

Reach (This creature can block creatures with flying.)

: Mounted Archers can block an additional creature this turn.

Imprint — When Mourner's Shield enters the battlefield, you may exile target card from a graveyard.

, : Prevent all damage that would be dealt this turn by a source of your choice that shares a color with the exiled card.

, : Target player gains 1 life.

Vigilance

Disturb (You may cast this card from your graveyard transformed for its disturb cost.)

When Mournwhelk enters the battlefield, target player discards two cards.

Evoke (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)

Create a 3/3 green Hippo creature token.

Choose target opponent and target creature they control. You and that player have a breath-holding contest. If you win, you gain control of that creature.

: Add one mana of any color among legendary creatures and planeswalkers you control.

: Add .

: Add .

: Add one mana of any color.

: Add .

: Add .

Whenever you roll a 4 or higher, create a 3/3 colorless Robot artifact creature token. If you rolled 6 or higher, instead create that token and a Treasure token.

, : Roll a six-sided die plus an additional six-sided die for each mana from Treasures spent to activate this ability.

Flying

, : Return Mtenda Griffin to its owner's hand and return target Griffin card from your graveyard to your hand. Activate only during your upkeep.

Whenever Mtenda Lion attacks, defending player may pay . If that player does, prevent all combat damage that would be dealt by Mtenda Lion this turn.

+1: Until your next turn, up to one target creature gets -5/-0.

−3: Return up to two target creatures to their owners' hands.

−7: Creatures you control with flying get +5/+5 until end of turn.

Flash

When Muck Drubb enters the battlefield, change the target of target spell that targets only a single creature to Muck Drubb.

Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Haste

Mudbrawler Cohort gets +1/+1 as long as you control another red creature.

Kinship — At the beginning of your upkeep, you may look at the top card of your library. If it shares a creature type with Mudbutton Clanger, you may reveal it. If you do, Mudbutton Clanger gets +1/+1 until end of turn.

Counter target instant or sorcery spell.

Transmute (, Discard this card: Search your library for a card with the same mana value as this card, reveal it, put it into your hand, then shuffle. Transmute only as a sorcery.)

Creatures without flying don't untap during their controllers' untap steps.

At the beginning of each player's upkeep, that player may choose any number of tapped creatures without flying they control and pay for each creature chosen this way. If the player does, untap those creatures.