msem-instigator

Pay 2 life: Lifecraft Aberration gains indestructible until end of turn.
Pay 3 life: Lifecraft Aberration gets +1/+1 until end of turn.

Destroy target creature.
You gain 2 life.

Draw two cards, then create an X/X white Illusion creature token, where X is the number of cards you've drawn this turn.

When Jaakuna Bloodsworn enters, any opponent may have it deal 3 damage to them. If a player does, sacrifice Jaakuna Bloodsworn.

Menace

Enchant creature
When Aerie Watch enters, draw a card.
Enchanted creature gets +1/+1 and has reach.

Whenever Mei's Student deals combat damage to a player, fateseal 1, then scry 1. (Look at the top card of an opponent's library, then you may put it on the bottom.)

Ward—Pay 3 life.
Igniderm enters with three ignition counters on it.
At the beginning of your upkeep, remove an ignition counter from Igniderm. If you can't, sacrifice it.

Flying
Whenever you cast a spell, Gilded Hawk gets +1/+1 until end of turn for each of that spell's colors.

Flying
If Liguno, Who Transcends All or another permanent you control would be put into a graveyard from the battlefield, exile it instead. Return that card to the battlefield under its owner's control at the beginning of the next end step.

Sabotage — Whenever an opponent or permanent an opponent controls becomes the target of a spell you control, put a quest counter on Beckon Darkness.
At the beginning of your upkeep, if Beckon Darkness has four or more quest counters on it, return target creature card from your graveyard to the battlefield.

{T}: Add one mana of any color.
{2}, {T}: Choose a color. Add X mana of the chosen color, where X is the number of permanents you control that could produce mana of that color.

Flying, lifelink
At the beginning of each end step, if you gained 3 or more life this turn, choose one —
• Put a +1/+1 counter on Waxing Angel.
• Exile target artifact or enchantment.

Counter target spell. If you are glorious, draw a card. (You are glorious as long as you have a glory counter.)

When Spirit of the Sands enters, if you cast it, target opponent gains control of it.
At the beginning of your end step, draw three cards, then discard two cards.

(Add a quest counter as this enters. Sacrifice after 3.)
Whenever you attack, add a quest counter.
1, 2 — Mill a card, then create a 1/1 black Peasant creature token.
3 — Each player sacrifices a creature.
Monument {2}{B}{B} (You may cast this transformed from your graveyard for its monument cost. Exile it if it would leave the battlefield or not resolve.)

(As this Discovery enters and after your draw step, add a progress counter. Stop after you've discovered.)
I, II — Look at the top five cards of your library. Put up to one creature card with mana value 2 or less from among them onto the battlefield. Put the rest on the bottom of your library in a random order.
Discovery — At the beginning of combat on your turn, tap target creature an opponent controls.

Destroy target artifact, enchantment, or creature with slipstream.
You gain 4 life.

Enchant creature you control
When Festive Euphoria enters, you gain life and draw cards equal to enchanted creature's power.
Enchanted creature can't be blocked by creatures with power 2 or less.

Veiled Merfolk can't be blocked by creatures with greater power.
When Veiled Merfolk enters, mill a card.

Trample
Improve {1}{R} ({1}{R}: Put a +1/+1 counter on this creature. This costs {1} more to activate for each +1/+1 counter on it. Improve only as a sorcery.)
Embattled creatures you control get +2/+0. (A creature is embattled if it has a counter on it or has a permanent you control attached to it.)

Gestalt (When this or another creature enters under your control, you may merge it with the one in play, keeping counters and attachments. They become the permanent on top plus all abilities from under it.)
Other creatures you control have base power and toughness equal to this creature's base power and toughness.

{2}, Exile a land card from your graveyard: Create a token that's a copy of that land.

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.)
When Waning Behemoth enters, you may pay {X}. If you do, put X time counters on it.

Draw two cards, then discard two cards.
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.)