msem-instigator

Heretic (Whenever you cast a spell that doesn't share a color with this creature, it gets +1/+1 until end of turn.)
{1}{W}: You gain life equal to Sunken Outcast's power.

Smelting Breath deals 5 damage to target creature. Destroy up to one Equipment attached to that creature.

Put target attacking or blocking creature on the bottom of its owner's library.

Whenever you cast a creature spell or create a creature token, you may exile target creature you control. Return it to the battlefield under its owner's control at the beginning of the next end step.

Flash (You may cast this spell any time you could cast an instant.)
When Majestic Hippocamp enters, target creature gets -2/-0 until end of turn.

As an additional cost to cast this spell, exile two permanent cards from your graveyard.
You may cast Adiran Survivors from your graveyard.

Wildcast — When Ivier, Soul of the Woods enters, return target monocolored creature card from your graveyard to your hand. If mana from a nonland source was spent to cast Ivier, return that card to the battlefield instead.

Tap another untapped creature you control: Knight of the Orchards gets +1/+1 until end of turn.

({T}: Add {U} or {R}.)
Roaring Cascade enters tapped.

Ward—Pay 3 life.
Whenever you cast an instant or sorcery spell, recruit. (Create a 0/0 white Soldier Army creature token, then put a +1/+1 counter on each Army you control.)

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.)
Hopeless Wanderer can't be blocked.

Equipped creature has menace.
Sacrifice an artifact or enchantment: Equipped creature gets +2/+2 until end of turn.
Equip {1}

When Ginjiro Chimei enters, you may search your library for a card with an activated ability, put it into your graveyard, then shuffle.
You may cast Ginjiro Chimei from your graveyard by paying 2 life in addition to paying its other costs.

Disgraced 2 (This enters with two -1/-1 counters. Whenever it deals combat damage to a player, remove all -1/-1 counters from it.)
Whenever Madame Deficit attacks, you may tap target creature.

When Quillback dies, you may shuffle him into his owner's library. If you do, return up to one target Shaman creature card and up to one target non-Shaman creature card from your graveyard to your hand.

Reveal the top seven cards of your library. You may put a creature card from among them onto the battlefield. Put the rest into your graveyard. Then flip a coin. If you win the flip, return Primal Evocation to its owner's hand.

Flying
When Blossoming Hatchling enters, create a Treasure token.

When this creature enters, look at target opponent's hand. You may exile a nonland card from it. For as long as that card remains exiled, its owner may play it. A spell cast this way costs {2} more to cast.
Arise {2}{W}{W} ({2}{W}{W}, Exile this from your graveyard as a sorcery: Create a black token copy of it that's also a Zombie and can't block.)

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.)
Hexproof
At the beginning of your upkeep, put a +1/+1 counter on this creature.

Enchant creature
Enchanted creature doesn't untap during its controller's untap step.
At the beginning of the upkeep of enchanted creature's controller, that player mills a card.

Eternal Duneborn enters tapped.
Foresight — Whenever you draw your second card each turn, return Eternal Duneborn from your graveyard to your hand.

Whenever you cast or copy an instant or sorcery spell this turn, Instant of Brilliance deals 1 damage to each opponent.
Copy target instant or sorcery spell you control. You may choose new targets for the copy.

Art of war — At the beginning of your end step, if Sasori Ronin dealt damage to an opponent this turn, it deals 1 damage to any target.