msem-instigator

When Delugic Surger enters, if you control another Elemental, return target instant or sorcery card from your graveyard to your hand.

Gain control of target noncreature permanent.
Coalesce {8}{U}{U} (You may cast this from your graveyard for {8}{U}{U}. If you do, it enters as a Horror creature after it resolves. Exile it if it would leave the battlefield or not resolve.)

Players play with the top card of their libraries revealed.
[+2]: Target player mills a card. Draw a card.
[+1]: Create a 1/1 blue Illusion creature token with “This gets +1/+1 for each other Illusion you control.”
[–4]: Return target creature card from a graveyard to the battlefield under your control. It's an Illusion in addition to its other types.

Flying (This creature can't be blocked except by creatures with flying or reach.)
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

When Secluded Monument enters, choose a color.
Whenever you cast a spell of the chosen color, Secluded Monument becomes a 5/5 Golem creature until end of turn.

Whenever a player casts an instant or sorcery spell from their hand, you may exile that card as it resolves instead of putting it anywhere else.
Whenever Skill Sketcher attacks, you may cast a card exiled with it. That spell costs {X} less to cast, where X is Skill Sketcher's power.

[+1]: Mill two cards. Untap up to one target creature or land.
[–2]: Return target creature or land card from your graveyard to your hand.
[–X]: You may sacrifice a creature. If you do, search your library for a creature card with mana value X or less, put it onto the battlefield, then shuffle.

Target creature you control fights target creature you don't control.

Enchant creature
When Impassioned Craze enters, draw a card.
Enchanted creature has “{R}: This creature gets +1/+0 until end of turn.”

This spell can't be countered.
If a spell or ability an opponent controls causes you to sacrifice Wellspring of Creation, you may put it on the top or bottom of its owner's library instead of putting it into that player's graveyard.

[+1]: Until your next turn, when up to one target creature dies, return a creature card with lesser mana value from your graveyard to the battlefield tapped.
[–1]: Target player discards a card. When they do, return a card with equal mana value from your graveyard to your hand.
[–2]: You may sacrifice a creature. When you do, exile target nonland permanent.

Exile the top card of your library. You may play that card this turn.
Flashback {1}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

When Desert Bloom enters, you gain 4 life.
At the beginning of your upkeep, add {G}{G}.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
At the beginning of your end step, if you've cast three or more spells this turn and Nizev Enforcer isn't a token, create a token that's a copy of it.

This spell costs {1} less to cast if you control a Warrior.

Whenever Maritime Thug becomes tapped, it deals 1 damage to each opponent.

{T}, Sacrifice an artifact or creature: Each opponent loses 1 life and you gain 1 life.

Menace
Whenever you cast a noncreature spell, Enduring Charge gets +1/+1 until end of turn.

At the beginning of your upkeep, put a charge counter on Swell of Birth, then create a 1/1 colorless Elemental creature token for each charge counter on it.

Civilized — Whenever Founding Hero attacks, if you control an artifact, a creature, and an enchantment, Founding Hero gains double strike until end of turn.

Whenever a land you control enters, you may tap target creature.

Enchant creature
Enchanted creature can't attack or block.
{2}{U}: Return Whiplash and enchanted creature to their owners' hands.

{3}{W}: Exile Vanishing Memory and target creature an opponent controls.

Gain control of target creature until end of turn. Untap that creature. Until end of turn, it gains haste and “Whenever this creature deals combat damage to a player, aetherize it.” (To aetherize, create a token that's a copy of it, then exile that token.)

Harmony — You gain 2 life.
When New Alores Fiddler enters, harmonize. (Trigger up to one harmony of one permanent you control.)