msem-instigator

{T}: Envious Nereid deals 1 damage to target creature and 1 damage to that creature's controller.

Divine Conspiracy has flash as long as an Angel, Demon, Faerie, or Spirit you controlled died this turn.
Choose up to two target nonland permanent cards in your graveyard that were put there from the battlefield this turn. Return them to the battlefield.

As long as Sewer Pack is on the battlefield, you may cast spells named Sewer Pack from your graveyard.
Sewer Pack gets +1/+1 for each other creature on the battlefield named Sewer Pack.

{3}{G}: Seasoned Farmer gets +2/+2 until end of turn.

Exile up to three target cards from a single graveyard. You gain 3 life.

Mill five cards, then return up to one creature card, up to one land card, and up to one noncreature, nonland card from your graveyard to your hand. Exile Explore Forgotten Lands.

Counter target spell. If a noncreature spell is countered this way, conjure a card named Fatigue and put it on top of your library. (It's a colorless sorcery that costs {2} with “Draw a card.”)

[+1]: Create a tapped colorless land token named Far-Off Lands with “{T}: Add one mana of any color.”
[–1]: Choose a color. Untap all lands you control that could produce that color.
[–6]: Draw a card for each differently named land you control.

Tithe (As you cast this spell, you may tap three artifacts and/or creatures you control.)
Creatures you control gain indestructible until end of turn. If this spell's tithe was paid, put a +1/+1 counter on each creature you control.

Flying
Long-Finned Skywhale can block only creatures with flying.

Exile target nonblack creature. Its controller exiles a card at random from their hand.

Target creature you control gets +1/+2 until end of turn. It fights target creature you don't control.

Explorer's Ascent enters tapped.
{T}: Add {W}.
{T}: Target creature you control gets +1/+1 until end of turn.

Whenever you cast a spell from anywhere other than your hand, you may sacrifice a creature. If you do, copy that spell. You may choose new targets for the copy.

When Boundary Hallowblade enters, create a white Aura enchantment token named Consecration Blessing attached to target land. The token has enchant land and “Enchanted land is named Hallowed Ground and has indestructible.”

Flying, trample
Prismatic — Whenever you cast a multicolored spell, put a +1/+1 counter on Azure Caterwauler.

Draw a card, then create a 1/1 blue Elemental creature token. If you drew three or more cards this turn, create three of those tokens instead.

When Mulchborn Behemoth enters, you may sacrifice any number of lands.
Mulchborn Behemoth gets +1/+1 for each land card in your graveyard.
{B}{G}, Sacrifice a land: Destroy target creature or land.

Whenever you cast an Aura spell, nourish 1. (To nourish 1, either put a +1/+1 counter on this creature or create a 1/1 white Citizen creature token.)

{1}{R}, Sacrifice Crackling Seaform: Counter target spell unless its controller has Crackling Seaform deal 3 damage to them.

{1}{U}, Sacrifice two artifacts: Draw a card.
Whenever an artifact you control dies, put a stun counter on up to one target creature. (If a permanent with a stun counter would become untapped, remove one from it instead.)

When Bioluminescent Predator dies, draw a card, then you may put a land card from your hand onto the battlefield.

Whenever you cast an instant or sorcery spell from your hand, you may cast target card with the same name as that spell from your graveyard. (You still pay its costs.)

Assault {B} (Whenever this attacks, if it has no +1/+1 counters on it, you may pay its assault cost to put a +1/+1 counter on it.)
When Hilaback Outriders assaults, it gains menace until end of turn.

Whenever you create a token, Substack Runner gets +1/+0 and can't be blocked until end of turn.