Flying

At the beginning of your end step, if a permanent you controlled left the battlefield this turn, put a +1/+1 counter on each tapped creature you control, then untap them.

Choose a Background (You can have a Background as a second commander.)

This spell costs less to cast for each counter among players and permanents.

Trample

Lumbering Megasloth enters tapped.

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Whenever a creature dies, put a +1/+1 counter on Lumberknot.

Flying

Whenever an artifact you control enters, you may tap target permanent.

: Luminous Guardian gets +0/+1 until end of turn.

: Luminous Guardian can block an additional creature this turn.

Sunburst (This enters with a +1/+1 counter on it for each color of mana spent to cast it.)

Remove a +1/+1 counter from Lunar Avenger: Lunar Avenger gains your choice of flying, first strike, or haste until end of turn.

Target creature you control gets +X/+0 and gains first strike and trample until end of turn.

When this creature transforms into Lunarch Inquisitors, you may exile another target creature until Lunarch Inquisitors leaves the battlefield.

: Add .

: Add . Spend this mana only to cast a creature spell.

, , Sacrifice Lupinflower Village: Look at the top six cards of your library. You may reveal a Bat, Bird, Mouse, or Rabbit card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

As Lurebound Scarecrow enters, choose a color.

When you control no permanents of the chosen color, sacrifice Lurebound Scarecrow.

Whenever a creature you control explores, target creature an opponent controls gets -2/-2 until end of turn.

When an opponent has 10 or less life, if Lurking Jackals is an enchantment, it becomes a 3/2 Jackal creature.

Enchant creature

Whenever enchanted creature becomes tapped, Lust for War deals 3 damage to that creature's controller.

Enchanted creature attacks each combat if able.

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.)

Flying

When Lyev Skyknight enters, detain target nonland permanent an opponent controls. (Until your next turn, that permanent can't attack or block and its activated abilities can't be activated.)

, Discard an Elf card: Target creature gets -X/-X until end of turn, where X is the number of Elves you control.

Target creature gets +2/+2 until end of turn. Up to one other target creature gets +1/+1 until end of turn.

Equipped creature gets +1/+1 for each charge counter on Mace of the Valiant and has vigilance.

Whenever a creature you control enters, put a charge counter on Mace of the Valiant.

Equip

Haste

, Discard a card: Draw a card.

(: Add .)

Madblind Mountain enters tapped.

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

Flying

Whenever Maelstrom Muse attacks, the next instant or sorcery spell you cast this turn costs less to cast, where X is Maelstrom Muse's power as this ability resolves.

Whenever an opponent casts or copies an instant or sorcery spell, they lose 1 life.

Whenever equipped creature attacks, it deals damage equal to its power to the player or planeswalker it's attacking.

Equip

: Add .

, : Put a storage counter on Mage-Ring Network.

, Remove any number of storage counters from Mage-Ring Network: Add for each storage counter removed this way.

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

: Change the text of target spell or permanent by replacing all instances of + with -, and vice versa, until end of turn.

Magma Jet deals 2 damage to any target. Scry 2.

Magma Pummeler enters with X +1/+1 counters on it.

If damage would be dealt to Magma Pummeler while it has a +1/+1 counter on it, prevent that damage and remove that many +1/+1 counters from it. When one or more counters are removed from Magma Pummeler this way, it deals that much damage to any target.

At the beginning of your upkeep, put a -1/-1 counter on Magmaroth.

Whenever you cast a noncreature spell, remove a -1/-1 counter from Magmaroth.

As an additional cost to cast this spell, discard a land card.

Draw two cards.

, Sacrifice a nonland permanent: Magmaw deals 1 damage to any target.

Blue creatures don't untap during their controllers' untap steps.

At the beginning of each player's upkeep, that player may choose any number of tapped blue creatures they control and pay for each creature chosen this way. If the player does, untap those creatures.

Attach target Equipment to target creature. (Control of the Equipment doesn't change.)

At the beginning of your end step, create a Treasure token for each creature that died this turn. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")

Other creatures you control get +1/+1.

Landfall — Whenever a land you control enters, create a 1/1 white Human Warrior creature token.

Flying

Whenever Majestic Heliopterus attacks, another target Dinosaur you control gains flying until end of turn.

Creatures you control get +1/+0 and gain indestructible until end of turn. (Damage and effects that say "destroy" don't destroy them.)

Creatures your opponents control get -1/-1 until end of turn.

Return target creature card from your graveyard to the battlefield with a mannequin counter on it. For as long as that creature has a mannequin counter on it, it has "When this creature becomes the target of a spell or ability, sacrifice it."

Makindi Mesas enters tapped.

: Add .

Flying

: Regenerate Malach of the Dawn.

When this creature transforms into Malady Invoker, target creature an opponent controls gets -0/-X until end of turn, where X is Malady Invoker's power.

Flying, deathtouch

Whenever you gain life, Malakir Familiar gets +1/+1 until end of turn.

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."

Choose target creature you control and target creature you don't control. If the creature you control entered this turn, put a +1/+1 counter on it. Then those creatures fight each other.

Flying

Whenever one or more Pirates you control deal damage to your opponents, you create a Treasure token for each opponent dealt damage. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")

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

, Sacrifice a creature: Return target creature card from your graveyard to your hand.

Destroy target nonblack creature. It can't be regenerated.

Flying

Malicious Invader gets +2/+0 as long as an opponent controls a Human.

Enchant creature

Enchanted creature gets +3/+3 and has vigilance.

Umbra armor (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)