msem-instigator

Put two +1/+1 counters on target creature. You gain life equal to that creature's power.

Until end of turn, creatures you control get +1/+1 and gain trample and poisonous 1. (Whenever one of those creatures deals combat damage to a player, that player gets a poison counter.)

Up to two target creatures can't block this turn.
Agonize (You may cast this card from your graveyard by putting a -1/-1 counter on a creature you control in addition to paying its other costs. Then exile this card.)

Deathtouch
Vanishing 4 (This creature enters with four time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)

When Last-Thought Feeder dies, fateseal 2. (To fateseal 2, look at the top two cards of an opponent's library, then put any number of them on the bottom of that player's library and the rest on top in any order.)

Target creature gets +X/+0 until end of turn, where X is the number of instant and sorcery cards in your graveyard.

Flash
Flying
When Laughing Bird enters, you may return a creature you control to its owner's hand.

Trample
Whenever Lava Hellions attacks, you may have it consume. If you do, it deals 2 damage to defending player. (To consume, sacrifice another creature or exile a creature card from your graveyard.)

Menace
Whenever you sacrifice an artifact or creature, Lava Scutterer deals 2 damage to any target.

Lava Spill deals 2 damage to any target.
Look at the top three cards of your library. Put one on top and the rest on the bottom in any order.

Vanishing 1 (This creature enters with a time counter on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
Whenever a creature you control deals combat damage to a player, put a time counter on Lavacore Elemental.

{4}{R}, Sacrifice Lavahurler: It deals 5 damage to target player or planeswalker.

First strike
{R}, Discard a land card: Put a +1/+1 counter on Lavamancer Adept. It gains menace until end of turn.

{2}{R}, Sacrifice Lavaspark Igniter: It deals 2 damage to target creature.

Menace

{1}{R}: Lavatongue Lizard gets +1/+0 until end of turn.
Ferocious — Whenever Lavatongue Lizard attacks, if you control a creature with power 4 or greater, Lavatongue Lizard gains first strike until end of turn.

Lavatrailer enters tapped.
Whenever a creature attacks you, if Lavatrailer is tapped, Lavatrailer deals 1 damage to it.

Counter target spell unless its controller pays {4}. If that spell is countered this way, exile it instead of putting it into its owner's graveyard.

Exile up to one target permanent you control. Return it to the battlefield under its owner's control at the beginning of the next end step.
Recruit. (Create a 0/0 white Soldier Army creature token, then put a +1/+1 counter on each Army you control.)

Counter target spell that targets you or a permanent you control.
Surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

Whenever a creature you control dies, you may pay {G}. If you do, draw a card.

Lazhu, Whisperflame Seer enters with your choice of a trample or +1/+1 counter on him.
Whenever a creature in Lazhu's pack deals damage to a player or planeswalker, draw a card. (Two or more creatures you control with equal power are in a pack.)

Ward {2} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {2}.)
Whenever a Role becomes attached to Lead Athlete or you cast a spell that targets it, put a +1/+1 counter on Lead Athlete.

Attacking creatures get +2/+0 until end of turn. If you control a legendary creature, those creatures also gain first strike until end of turn.

Target creature you control gets +3/+3 and gains trample until end of turn. Other creatures you control gain trample until end of turn.