msem-instigator

When Lightblessed Claymore enters the battlefield, attach it to target creature you control.
Equipped creature gets +2/+0 and has lifelink.
Equip {4}

This spell costs {2} less to cast if it targets a multicolored card.
Return target card from your graveyard to your hand.

Whenever you cast a noncreature spell, you may have target player mill two cards. Then if a player has twenty or fewer cards in their library, put a +1/+1 counter on Living Atrocity.

Once each turn, when a permanent is exiled from the battlefield by a spell or ability you control, you may draw a card.

{T}: Add {C}.
{3}: Living Planet becomes a 2/2 Elemental creature until end of turn. This ability costs {1} less to activate for each creature you control.

{R}{G}, Reveal Living Supernova from your hand: Put a land card from your hand onto the battlefield tapped. Activate only as a sorcery.
Whenever Living Supernova or a land enters the battlefield under your control, exile the top two cards of your library. Until the end of your next turn, you may play those cards.

Living Vista enters the battlefield tapped.
{T}: Add {G} or {W}.
{1}, {T}: Add one mana of any color.

Whenever you draw a card, put a quest counter on Lockdown.
As long as there are three or more quest counters on Lockdown, creatures with power 3 or greater don't untap during their controller's untap steps.

As long as you control no other Humans, Lone Survivor gets +2/+2 and has “Noncreature spells cost {1} more to cast.”

Trample
Augmented — When Lonely Giant enters the battlefield, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, put two +1/+1 counters on it.

{T}: Add one mana of any color.
Augmented — As long as you've spent {W}{U}{B}{R}{G} to cast spells this turn, spells you control can't be countered.

When Long Lost Cause enters the battlefield, each opponent exiles a card from their hand or a creature they control.

Counter target spell. Create a 1/1 blue Elemental creature token with flying.

When Lost Crew enters the battlefield or dies, crystallize. (Put a +1/+1 counter on a creature you control or create a Treasure.)

Lost Explorer has first strike as long as it's attacking.
{1}{B}, Exile Lost Explorer from your graveyard: Crystallize. (Put a +1/+1 counter on a creature you control or create a Treasure.)

Target player discards two cards.

Put target artifact or enchantment with mana value less than or equal to the number of basic lands you control on the bottom of its owner's library.

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

Cadence (Whenever you cast a spell, if its mana value is greater than this creature's power, put a +1/+1 counter on this creature.)
{1}{R}, Remove a +1/+1 counter from Lt. Daisy Saxon: She deals 2 damage to target player or planeswalker.

Reach
Lupine Skygrazer enters the battlefield with a +1/+1 counter on it if three or more colors of mana were spent to cast it.

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

When Lust for Life enters the battlefield, search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
Augmented — Whenever a creature enters the battlefield under your control, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, you may sacrifice Lust for Life. If you do, create a token that's a copy of that creature.

When Lysander Jal enters the battlefield, create a token that's a copy of another target noncreature permanent you control.
Whenever you cast a spell from your graveyard, return target permanent card from your graveyard to your hand.

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.)

This spell costs {X} less to cast, where X is the number of creatures you control.
Vigilance