msem-instigator

First strike, haste
Whenever Lothaire attacks, create a 0/0 colorless Reflection creature token that's tapped and attacking. Creatures you control get +1/+1 until end of turn.
{2}{R}{W}: Put a +1/+1 counter on each creature you control.

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

When Lotus Debutante enters, create a colorless artifact token named Lotus Petal with “{T}, Sacrifice this artifact: Add one mana of any color.”
{3}{U}: Draw a card.

When Lotus Feaster enters, create a colorless artifact token named Lotus Petal with “{T}, Sacrifice this artifact: Add one mana of any color.”

When Lotus-Scarred Luocha enters, create a 2/1 black Spirit creature token with “This creature can't block.”
Whenever a creature in Lotus-Scarred Luocha's pack dies, each opponent loses 2 life and you gain 2 life. (Two or more creatures you control with equal power are in a pack.)

Deathtouch, lifelink
If a creature would die, exile it instead.
Lotusheart Gorran has all activated and triggered abilities of creature cards exiled with it.

Trample
Lotusleaf Blade gets +1/+1 as long as you control another Warrior.

Heretic (Whenever you cast a spell that doesn't share a color with this creature, it gets +1/+1 until end of turn.)
Whenever you cast a white, blue, black, or red spell, add one mana of any color that spell isn't.

Whenever you make first contact, create a 1/1 white Bird creature token with flying. (You make first contact the first time each turn you cast a spell with a name not in your graveyard or control already.)
Whenever three or more creatures you control deal combat damage to a player, create a token that's a copy of another target permanent you control.

Flying
Whenever Lower Stratosphere Destroyer blocks or becomes blocked by a creature with flying, it gets +2/+2 until end of turn.
Crew 2

Vigilance
Whenever Lowly Cataphract and at least two other creatures attack, put a +1/+1 counter on Lowly Cataphract.
Surpass {5}{W} ({5}{W}: Transform this. This costs {1} less to activate for each counter on
it. Activate only as a sorcery.)

Motivate 2 (When this creature enters, you may motivate target creature with less power than this by putting two +1/+1 counters on it.)
Whenever a creature you control becomes motivated, you gain 2 life.

When Loyal Retriever dies, search your library for an Aura or Equipment card, reveal it, put it into your hand, then shuffle.
Foreshadow {5}{W} (You may cast this spell for its foreshadow cost. If you do, also trigger its “dies” abilities when it enters.)

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.

As an additional cost to cast this spell, sacrifice a permanent.
Return up to two target cards from your graveyard to your hand. Exile Lu'She Temple Customs.

As an additional cost to cast this spell, exile any number of other cards from your graveyard that have three or more card types among them.
Deathtouch
You may cast Lucid Dweller from your graveyard.

When Lucien's Trail enters, exile target creature or enchantment an opponent controls.
Sacrifice another permanent: Lucien's Trail becomes a copy of the exiled card until end of turn.

[+1]: Reveal the top card of your library and put that card into your hand. You lose life equal to its mana value.
[+1]: Until end of turn, Lucien, the Grifter becomes a legendary 3/3 black and red Human Warrior creature with deathtouch, lifelink, and indestructible.
[–3]: Exile target artifact or creature. You gain life equal to its mana value.

[+1]: Until your next turn, up to one target creature gets -2/-1 and gains “When this creature dies, merge it under Lucien, the Ravenous. He has its abilities.”
[–2]: Merge target creature under Lucien, the Ravenous. He has that creature's abilities.
[–6]: For each card merged with Lucien, create a token that's a copy of that card, except it has haste.

Reveal the top card of your library. Draw X cards, where X is that card's mana value.

Harvest (You may tap any number of creatures you control as you cast this spell. If you do, reduce this spell's mana cost by their total power.)
{T}, Sacrifice a land: Search your library for a land card and put it onto the battlefield, then shuffle.

[+1]: Move a counter from up to one target permanent onto another permanent that shares a type with it.
[–1]: Target creature gets -1/-3 until end of turn.
[–5]: Search target opponent's library for a creature or planeswalker card and put that card onto the battlefield under your control. Then that player shuffles.

Trample
Lumbering Ox gets +1/+1 for each land you control.
At the beginning of your upkeep, reveal the top card of your library. If it's a land card, you may exile it and repeat this process.
You may play cards exiled with Lumbering Ox.

Lumbering Stoneshell has hexproof as long as it's untapped.