Whenever a spell or ability you control counters a spell, you may create a 1/1 blue Merfolk creature token.

Tap seven untapped Merfolk you control: Counter target spell.

Lumbering Falls enters the battlefield tapped.

: Add or .

: Lumbering Falls becomes a 3/3 green and blue Elemental creature with hexproof until end of turn. It's still a land.

, : Target player draws a card, then discards a card. If that player discards an artifact card this way, untap Lumengrid Augur.

Lurking Roper doesn't untap during your untap step.

Whenever you gain life, untap Lurking Roper.

(: Add or .)

Lush Portico enters the battlefield tapped.

When Lush Portico enters the battlefield, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Whenever Luxurious Locomotive attacks, create a Treasure token for each creature that crewed it this turn. (They're artifacts with ", Sacrifice this artifact: Add one mana of any color.")

Crew 1. Activate only once each turn. (Tap any number of creatures you control with total power 1 or more: This Vehicle becomes an artifact creature until end of turn.)

(: Add .)

Madblind Mountain enters the battlefield tapped.

, : Shuffle your library. Activate only if you control two or more red permanents.

When Maestros Theater enters the battlefield, sacrifice it. When you do, search your library for a basic Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle and you gain 1 life.

Whenever you commit a crime, create a tapped Treasure token. This ability triggers only once each turn. (Targeting opponents, anything they control, and/or cards in their graveyards is a crime.)

Sacrifice three Treasures: Create a 4/4 red Scorpion Dragon creature token with flying and haste. Activate only as a sorcery.

, : Untap target creature that has an activated ability with in its cost.

Magma Opus deals 4 damage divided as you choose among any number of targets. Tap two target permanents. Create a 4/4 blue and red Elemental creature token. Draw two cards.

, Discard Magma Opus: Create a Treasure token.

Magosi, the Waterveil enters the battlefield tapped.

: Add .

, : Put an eon counter on Magosi, the Waterveil. Skip your next turn.

, Remove an eon counter from Magosi, the Waterveil and return it to its owner's hand: Take an extra turn after this one.

, : Untap X target lands.

, : Untap target artifact an opponent controls and gain control of it until end of turn. It gains haste until end of turn. When you lose control of the artifact, tap it.

Makindi Mesas enters the battlefield tapped.

: Add .

Whenever a player casts a green spell, you may pay . If you do, untap target permanent.

Choose target creature. You lose 2 life. Until end of turn, that creature gains "When this creature dies, return it to the battlefield tapped under its owner's control."

Gain control of target creature until end of turn. Untap that creature. It gets +2/+0 and gains haste until end of turn.

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.)

Tap X target artifacts, creatures, and/or lands. You lose X life.

Whenever a player taps a land for mana, that player adds one mana of any type that land produced.

You may choose not to untap Mana Leech during your untap step.

: Tap target land. It doesn't untap during its controller's untap step for as long as Mana Leech remains tapped.

Tap all lands target player controls and that player loses all unspent mana.

Lands target player controls don't untap during their next untap step.

Whenever a land an opponent controls is tapped for mana, tap all lands that player controls that could produce any type of mana that land could produce.

Manascape Refractor enters the battlefield tapped.

Manascape Refractor has all activated abilities of all lands on the battlefield.

You may spend mana as though it were mana of any color to pay the activation costs of Manascape Refractor's abilities.

, : Untap another target artifact.

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

Search your library for up to two basic land cards and/or Desert cards, put them onto the battlefield tapped, then shuffle.

Haste

When Marauding Dreadship enters the battlefield, incubate 2. (Create an Incubator token with two +1/+1 counters on it and ": Transform this artifact." It transforms into a 0/0 Phyrexian artifact creature.)

Crew 2 (Tap any number of creatures you control with total power 2 or more: This Vehicle becomes an artifact creature until end of turn.)

Marble Diamond enters the battlefield tapped.

: Add .

As an additional cost to cast this spell, you may exile any number of green cards from your hand. This spell costs less to cast for each card exiled this way.

Choose target creature with mana value less than X. Search your library for a creature card with the same name as that creature, put it onto the battlefield tapped, then shuffle.

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.)

Create X 1/1 white Soldier creature tokens with lifelink.

Mardu Skullhunter enters the battlefield tapped.

Raid — When Mardu Skullhunter enters the battlefield, if you attacked this turn, target opponent discards a card.

Marjhan doesn't untap during your untap step.

, Sacrifice a creature: Untap Marjhan. Activate only during your upkeep.

Marjhan can't attack unless defending player controls an Island.

: Marjhan gets -1/-0 until end of turn and deals 1 damage to target attacking creature without flying.

When you control no Islands, sacrifice Marjhan.

Gain control of target creature until end of turn. Put a +1/+1 counter on it and untap it. That creature gains haste until end of turn. (It can attack and this turn.)

Enchant land

Whenever enchanted land is tapped for mana, its controller adds an additional two mana in any combination of colors.

Tap an untapped creature you control, Discard a card: Target creature you control gets +X/+X until end of turn, where X is the number of cards in your hand.

Tap any number of untapped creatures you control. You gain 4 life for each creature tapped this way.

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.)

When Martyr's Soul enters the battlefield, if you control no tapped lands, put two +1/+1 counters on it.

Flash

Tapped creatures you control can block as though they were untapped.

For each opponent, gain control of up to one target creature that player controls until end of turn. Untap those creatures. They gain haste until end of turn.

, : Tap target creature.

Whenever Master of Diversion attacks, tap target creature defending player controls.

Whenever Matsu-Tribe Birdstalker deals combat damage to a creature, tap that creature and it doesn't untap during its controller's next untap step.

: Matsu-Tribe Birdstalker gains reach until end of turn. (It can block creatures with flying.)

: Matsu-Tribe Sniper deals 1 damage to target creature with flying.

Whenever Matsu-Tribe Sniper deals damage to a creature, tap that creature and it doesn't untap during its controller's next untap step.

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

Maze's End enters the battlefield tapped.

: Add .

, , Return Maze's End to its owner's hand: Search your library for a Gate card, put it onto the battlefield, then shuffle. If you control ten or more Gates with different names, you win the game.

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.

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.

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.)

Draw two cards.

Vigilance

Meldweb Strider enters the battlefield 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.)