msem-instigator

Distorted (This creature can be blocked by tapped creatures but not untapped creatures.)
{1}{W}: Target creature and all creatures with the same name as that creature get +0/+1 until end of turn.

Menace
Whenever an opponent casts a spell, Skhorvall Behemoth gets -2/-2 until end of turn.

Deathtouch
Whenever a creature dealt damage by Barbed Beast this turn dies, transform Barbed Beast.

Whenever a non-Spirit creature you control dies, you may create a token that's a copy of that creature except the token is a Spirit in addition to its other types and has haste.

Trample
Heretic (Whenever you cast a spell that doesn't share a color with this creature, it gets +1/+1 until end of turn.)

As an additional cost to cast this spell, sacrifice a creature.
Draw two cards. Create a tapped Treasure token.

Haunted Estate enters tapped unless another player controls a land that could produce {W} or {B}.
{T}: Add {W} or {B}.

If you would catalyze, catalyze twice instead. (The next spell you cast this turn costs {1} less to cast.)
You may pay an additional {2} as you cast a spell. If you do, reveal the bottom card of your library. You may put it into your graveyard or on top of your library.

{2}{G}, {T}: Another target creature you control gets +2/+2 until end of turn.

Destroy target creature. Then if there are ten or more cards in your graveyard, return target creature card from your graveyard to your hand.

Target spell or permanent becomes colorless.

Target opponent reveals their hand. You choose a nonland card from it. That player discards that card. You may put a card that has an Adventure that player owns from exile into that player's graveyard.

Whenever you create one or more non-Mutant creature tokens, choose one —
• Create a 0/0 green Plant Mutant creature token, then put a +1/+1 counter on it for each of those non-Mutant tokens.
• Draw a card.

Opalescent Heirloom enters with a charge counter on it for each color of mana spent to cast it.
Equipped creature gets +1/+1 for each charge counter on Opalescent Heirloom.
Equip—{3} or remove a charge counter from Opalescent Heirloom.

Whenever Coral Hunter attacks, another target creature can't be blocked this turn.

At the beginning of each opponent's upkeep, exile Daril's Timewalker and up to one other target nonland permanent you control, then return those cards to the battlefield under their owner's control.

Flash
When CySec Disruptor enters, if it was cast, target opponent conjures a card named Data-Point on top of their library. (It's a sorcery that costs {2} with “Draw a card.”)

This spell can't be countered.
Players can't gain life.
{1}{R}: This enchantment becomes a 4/4 red Elemental creature with trample and haste until end of turn. Activate only during your turn.

Barren Boneyard enters tapped.
{T}: Add {B}.
{2/B}{2/B}: Barren Boneyard becomes a 2/3 black Elemental creature with deathtouch until end of turn. It's still a land.

Each Merfolk and Wizard you control has “Whenever this creature attacks, abound.” (To abound, you may cast a spell that costs less than that creature from your hand without paying its mana cost.)

When Somnambulance enters, each player conjures a card named Fatigue and puts it on top of their library. (It's a colorless sorcery that costs {2} with “Draw a card.”)
Whenever a player casts a spell named Fatigue, you may draw a card. If you do, you lose 1 life.

Create a 2/1 red and white Fox creature token. If you're attacking, that token enters tapped and attacking.
Showcase {4}{R} (Then if you cast this for its showcase cost, create a 1/1 red Bard creature token that can't block and exile this. Whenever it attacks, you may cast a free copy of this.)

[+1]: Create a tapped colorless Bullet artifact token with “{T}, Sacrifice this artifact: It deals 1 damage to any target.”
[–1]: Exile target creature or planeswalker that was dealt damage this turn.
[–7]: You get an emblem with “At the beginning of each end step, you may draw X cards, where X is the amount of life your opponents lost this turn.”

Exile up to six land cards from your graveyard. For each card exiled this way, create a 1/1 black Spirit creature token with flying.
Flashback {1}{B}{B}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)