msem-instigator

Creatures can't attack you or planeswalkers you control unless their controller pays 2 life for each of those creatures.

Whenever Lotus Acolyte attacks, it gets +1/+0 and gains lifelink until end of turn.

Creatures you control gain lifelink until end of turn.

Whenever an Equipment you control enters, attach it to target creature you control.

Create a 1/1 white Bird creature token with flying. (Then exile this card. You may cast the creature later from exile.)

Ride {2}{W} ({2}{W}: Transform this and attach it to target creature you control without a Steed. Ride only as a sorcery.)

Whenever Loyalist Escort or another Knight or Soldier you control enters, you may choose one that hasn't been chosen this turn —
• Tap target creature an opponent controls.
• Untap target creature you control.

When Lumen Cell enters, create two 1/1 white Human creature tokens and you gain 2 life.
{1}{W}: Search your library for a card named Lumen Cell, reveal it, put it into your hand, then shuffle. Activate only as a sorcery.
{6}{W}{W}{W}: You win the game. Activate only as a sorcery and only if you control four or more permanents named Lumen Cell.

You may return a land you control to its owner's hand rather than pay this spell's mana cost.
Lumenbay Flyer Line enters tapped.
{T}: Add {W}.

Your opponents can't cast more than one spell each turn.
Identity — Lumi Orthodox gets +1/+2 as long as you control at least two other creatures that share a creature type with it.

When you cast this spell, copy it for each color of mana spent to cast it beyond the first.
Flying

When Luna enters, you may put a +1/+1 counter or loyalty counter on target creature or planeswalker.
Whenever another creature or planeswalker enters, you may exile Luna. Return her to the battlefield at the beginning of the next end step.

Whenever a creature enters, you may tap it. If you do, put a +1/+1 counter on it.

Flying
Golden age (If you cast an instant or sorcery spell, activated a nonmana ability, and attacked this turn, enter a renaissance for this game.)
Lunar Flock has vigilance as long as you're in a renaissance.

Whenever you cast a spell, for each of that spell's colors, create a 1/1 Scout creature token that's all colors.

Concord — Lurking Lahasia has first strike and lifelink as long as there are four or more card types among permanents you control.

Disgraced 2 (This enters with two -1/-1 counters. Whenever it deals combat damage to a player, remove all -1/-1 counters from it.)
Whenever Madame Deficit attacks, you may tap target creature.

Players can't sacrifice creatures to cast spells or activate abilities unless that player sacrifices an additional creature. The same is true for discarding cards and paying life.

Flying
{1}{W}: Target creature with a +1/+1 counter on it gains flying until end of turn.

Protection from sorceries
Whenever Magdel, Caller of Souls attacks, create a 1/1 white Spirit creature token with flying that's tapped and attacking for each storied permanent you control. Exile the tokens at end of combat. (Enchantments and legendary permanents are storied.)

Activated abilities of nonland permanents cost {2} more to activate.

Whenever you gain life, you may pay {X}, where X is less than or equal to the amount of life you gained. If you do, draw X cards.

Flash
Defender
When Majestic Garrison enters, another target creature you control gains indestructible until end of turn.

Majestic Nauticorn has first strike as long as it's attacking.
Cycling {W} ({W}, Discard this card: Draw a card.)

Double strike, vigilance
Whenever Major Benjamin Stout enters, attacks, or dies, recruit. (Create a 0/0 white Soldier Army creature token, then put a +1/+1 counter on each Army you control.)