Counter target spell. That spell's controller reveals their hand.

Other legendary creatures you control get +1/+1.
Whenever a legendary creature you control attacks, exile the top card of your library. You may play that card this turn.
Whenever you cast your fifth spell each turn, Juana deals 10 damage to any target.

Exile target nonland permanent. You gain 1 life for each counter on that permanent.

At the beginning of your upkeep, remove all counters from La Bete du Harnelle, then put two different counters of your choice not removed this way from among deathtouch, reach, vigilance, trample, or hexproof on it.

Whenever you cast an instant or sorcery spell, surveil 1. Lanternlight Assailant gets +1/+0 and gains flying until end of turn.
As long as there are five or more instant and/or sorcery cards in your graveyard, instant and sorcery spells you cast cost {1} less to cast.

Lavatorn Fields enters tapped unless you control a basic Swamp or a basic Mountain.

Menace
Indulgence
Whenever you indulge, put a +1/+1 counter on Lavish Host.

Instant and sorcery spells you cast cost {1} less to cast.
{2}{U}: Level 2
When this Class becomes level 2, you may return target instant or sorcery card from your graveyard to your hand.
{3}{U}: Level 3
Once each turn, when you cast an instant or sorcery spell, you may copy that spell. You may choose new targets for the copies.

Target creature gets +2/+0 and gains indestructible and lifelink until end of turn.

Choose one —
• Draw three cards.
• Return up to two target creatures to their owners' hands.

Exile target creature or planeswalker with mana value 3 or less. Its controller creates a Food token.

Indulgence
When Lost in the Moment enters, draw a card then discard a card.
Whenever you indulge, each opponent mills four cards.

Flash
When Louna, the Ever-Learning enters, for each kind of counter among permanents you control, you may put a counter of that kind on Louna, the Ever-Learning.

Flying
Lurking Gargoyle enters with your choice of counter from among deathtouch, menace or vigilance on it.

Lush Oasis enters tapped unless you control a basic Forest or a basic Island.

Flash
Lyceum Project enters with a +1/+1 counter and a flying counter on it.
When Lyceum Project dies, you may put its counters on target creature.

Indulgence
Whenever you indulge, create a 1/1 blue Gargoyle artifact creature token with flying.

Flying
When Marbled Messenger enters, draw a card.

When Marie Laurent enters, you may search your library for a card named Hans Nehmann or Diago Maldovo and reveal that card. If you do, shuffle, then put the card on top of it.
Legendary Allies you control have double strike.

When Master of the Dark Arts enters, you may exile an instant or sorcery card from your graveyard. If you do, each opponent sacrifices a creature.
Pay 2 life: Master of the Dark Arts gains flying and deathtouch until end of turn.

Master of the Ring enters with an opponent's choice of two different counters on it from among menace, first strike, and trample.

Choose a number between 0 and 5. Counter up to one target spell unless its controller pays {X}, where X is the chosen number. Then mill five minus X cards. You may return a card milled this way to your hand.

When Meat-Market Heifer is put into a graveyard from anywhere, create a Food token.

{3}{W}: Meowsician dares 4.
Whenever a creature you control becomes a Rebel, create a 1/1 white Warrior creature token.

Whenever Minou, the Russet Whisker attacks, you may tap up to one target creature an opponent controls and untap up to one target creature you control. If the creature you control had vigilance, put a +1/+1 counter on it.