msem-instigator

Choose a nonland card type. Target player reveals their hand. You choose a card of the chosen type from it. That player discards that card.

When Scuripi Collector enters, return target artifact, enchantment, or land card from your graveyard to your hand.

When Hitana's Implements enters, draw a card.
{1}, {T}: Add one mana of any color.
Augmented — At the beginning of each end step, if you've spent {W}{U}{B}{R}{G} on spells this turn, exile Hitana's Implements. If you do, create a 5/5 blue Horror creature token.

Aeroblast deals 5 damage to target attacking or blocking creature.

Create two 1/1 white Cleric creature tokens with lifelink.

Surging Lightning deals 2 damage to target creature or planeswalker. If you've cast another spell this turn, it deals 4 damage instead.

Enchant creature
Enchanted creature is a blue Shaman with base power and toughness 0/2, has “{2}, {T}: Scry 1,” and loses all other abilities.

As Pristine Chapel enters, you may pay 3 life. If you don't, it enters tapped.
{T}: Add {W}, {B}, or {G}.

Distorted (This creature can be blocked by tapped creatures but not untapped creatures.)
Shimmer (Whenever this creature attacks, create a tapped and attacking token that's a copy of it. Exile the token at the beginning of the end step.)

Outfitted Ibex has menace as long as it's embattled. (A creature is embattled if it has a counter on it or a permanent you control attached to it.)

Exile target permanent, then return it to the battlefield under its owner's control. If that permanent was an attacking creature, you may have it enter tapped and attacking.

Spells with mana value 5 or greater can't be cast.

{W}{B}, {T}: Exile target nonland permanent until Ediam, the Inside Man leaves the battlefield. You may cast that card for as long as it remains exiled, and you may spend mana as though it were mana of any type to cast that spell.

Prowess
When One of Purpose enters, if you cast it, create a Function token with “If you cast this spell from your hand, exile it. You may cast it from exile until the end of your next turn.” (It's an enchantment. As you cast an instant or sorcery spell, sacrifice any number of Functions to add their effects to that spell.)

Enchant opponent
Whenever Substack Exploit or another Curse becomes attached to enchanted player, that player loses 1 life and you gain 1 life.

Enchant creature
Enchanted creature has “Whenever this creature attacks, attacking creatures you control get +1/+1 until end of turn.”

Whenever you cast a spell, if it doesn't share a name with a permanent or a card in a graveyard, draw a card.

This spell costs {1} less to cast if it targets an attacking creature.
Target creature gets +2/+0 and gains indestructible until end of turn.

Put a +1/+1 counter on target creature you control if it's enchanted or equipped. It deals damage equal to its power to up to one other target creature.

Voracious 2 (As this enters, you may sacrifice up to two artifacts and/or creatures. This creature enters with that many +1/+1 counters on it.)
When Opportunistic Beast enters, destroy up to one target creature that was dealt damage this turn.

Haste, prowess
{3}{R}, {T}, Sacrifice Emberheart Arcanist: Return target instant or sorcery card from your graveyard to your hand.

{2}{R}: Thespian Soldier gains first strike until end of turn.

Menace
At the beginning of your end step, if you lost 4 or more life this turn, you may create Irgh'vall, a legendary 4/4 black Demon creature token with flying.

Exile up to three target cards from a single graveyard. Create a tapped 2/2 colorless Spirit creature token.

(Choose only one work as a sorcery to add its ability.)
When Memorial Plaza enters, create two 1/1 colorless Spirit creature tokens with flying.
{2}{W}: The Warrior
At the beginning of combat on your turn, put a +1/+1 counter on target creature you control.
{1}{B}: Rhapsody in Black
At the beginning of your end step, you may sacrifice a creature. If you do, draw a card.