msem-instigator

Whenever Align with Animus Vox enters or you attack with three or more creatures, crystallize. (Put a +1/+1 counter on a creature you control or create a Treasure.)

Flying, first strike, vigilance, trample, lifelink
{4}: Put a +1/+1 counter on Alin and Meva, Warqueens.

Flying
Whenever a creature enters under an opponent's control, you may pay {1}{B}. If you do, fateseal 1. (Look at the top one cards of an opponent's library, then put any number on the bottom and the rest on top in any order.)

Converge — Gain control of up to X target creatures with total mana value X or less, where X is the number of colors of mana spent to cast Alive and on Top.

Enchant player
At the beginning of enchanted player's upkeep, if they control two or more creatures and/or planeswalkers, they sacrifice a creature or planeswalker.

You may cast this spell without paying its mana cost if it targets a spell you control.
You may choose new targets for target spell.

Create two 2/1 black and red Cat Pirate creature tokens with menace. You lose 2 life.

Whenever a nontoken creature you control enters, create a 1/1 colorless Human creature token.

Creatures you control gain vigilance until end of turn. After this main phase, there's an additional combat phase followed by an additional main phase.
Compose (Then if you cast this from your hand, exile it and create a Saga token with “r3—You may cast a copy of this card from exile without paying its mana cost.”)

Vanishing 2 (This permanent enters with two time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
Whenever a time counter is removed from All Who Wander, you gain 2 life and scry 1.

As an additional cost to cast this spell, sacrifice a creature or pay {3}.
Destroy target creature with power 3 or less.

When All-Blossom Memorial enters, scry 1.
Prismatic — Whenever you cast a multicolored spell, you gain 1 life.
{T}: Add one mana of any color.

If a creature would die this turn, exile it instead.
All-Consuming Fire deals 4 damage to each creature.

Destroy up to X target artifacts and/or enchantments. If X is 3 or more, you gain twice X life. If X is 6 or more, create two X/X Elemental creature tokens that are all colors.

Flying
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Noncreature spells you cast cost {X} less to cast, where X is All-Encompassing Akvan's power.

When Allagras' Vanguard enters, create two 1/1 blue Merfolk creature tokens with “When this creature dies, draw a card, then discard a card”.

[+1]: Create a 1/1 blue Merfolk creature token with “When this creature dies, draw a card, then discard a card.”
[–1]: Target creature gets -2/-0 until your next upkeep and attacks during its controller's next turn if able.
[–7]: You get an emblem with “Creatures your opponents control get -4/-0 and attack each turn if able.”

You gain 4 life. Then if you have more life than an opponent, draw a card.

Mark (Whenever this creature attacks, mark target creature until end of turn.)
Alley Hunter has lifelink as long as it's blocked by a marked creature.

This spell costs {1} less to cast for each artifact you control.
Draw two cards.

Target opponent loses 2 life and you gain 2 life. If you control a Wizard, instead that player loses 4 life and you gain 4 life.

Enchant land
Whenever enchanted land is tapped for mana, its controller adds an additional {G}.
{1}{G}, Sacrifice Allure of the Woods: Draw a card.

Alluring Rider must be blocked if able.
Attain {4}{G} ({4}{G}: Transform this. Spend at least three colors of mana to activate this, and only as a sorcery.)

Whenever Almgrove Ambassador blocks or becomes blocked, you may untap target creature and remove it from combat.

Whenever Almgrove Bladesinger attacks, harmonize. (Trigger up to one harmony of a permanent you control.)
Harmony — Target creature can't block this turn.