msem-instigator

At the beginning of your end step, put a -1/-1 counter on each creature you control.
[+1]: Create two 2/2 black Zombie creature tokens.
[0]: Whenever a creature dies this turn, you draw a card and you lose 1 life.
[–4]: Target opponent gets an emblem with “At the beginning of your end step, put a -1/-1 counter on each creature you control.”

When Limbhacker Blade enters, each opponent discards a card.
Equipped creature gets +2/+0.
Equip {2}

When Limited Mortality enters, return up to one target creature card from your graveyard to your hand.
{1}{B}, Sacrifice Limited Mortality: Return target creature card from your graveyard to your hand. Activate only as a sorcery.

Target player discards a card. If they can't, you draw a card and they lose 2 life.
Acquiesce (If you cast this spell from your hand, exile it as it resolves. When one or more creatures you control deal combat damage to an opponent, you may cast this card from exile without paying its mana cost.)

Search your library for a card, then shuffle and reveal that card. Any opponent may have you put it into your graveyard. If a player does, draw a card. Otherwise, put it into your hand.

Return target creature card from your graveyard to your hand. If you control a Spirit, draw a card.

Enchant opponent
At the beginning of enchanted player's upkeep, exile up to two target cards from that player's graveyard. If two cards that share a type are exiled this way, you draw a card and you lose 1 life.

Target player sacrifices a creature. You gain life equal to that creature's toughness.
Compose (Then if you cast this from your hand, exile it and create a Saga token with “r3—You may cast a copy of this card from exile without paying its mana cost.”)

As an additional cost to cast this spell, sacrifice an artifact or creature.
Draw two cards.

You lose 2 life. Look at the top two cards of your library. You may mill two cards. Draw two cards, then mill two cards if you didn't mill before.

Choose one —
• Return target creature card from your graveyard to your hand.
• Return two target creature cards with total mana value 4 or less from your graveyard to your hand.

Choose two —
• You gain 3 life.
• Lost Memories deals 3 damage to any target.
• Investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)

Target player discards two cards.

This spell costs {1} less to cast if you've cast another spell this turn.
Destroy target creature.

When Lucien's Trail enters, exile target creature or enchantment an opponent controls.
Sacrifice another permanent: Lucien's Trail becomes a copy of the exiled card until end of turn.

Choose target creature, then choose two —
• Put a +1/+1 counter on the chosen creature.
• The chosen creature gains lifelink until end of turn.
• The chosen creature gains indestructible until end of turn.

This spell costs {2} less to cast if you control an Angel, Demon, Faerie, or Spirit.
Exile target creature or planeswalker.

Destroy target creature that was dealt damage this turn, then create a 3/2 black Mutant Horror creature token.

Enchant creature
Enchanted creature has distorted. (It can be blocked by tapped creatures but not untapped creatures.)
{1}{B}: Enchanted creature can't block this turn.

Create a tapped Treasure token.
Memento {2}{B}{B} (You may cast this from your graveyard for {2}{B}{B}. If you do, put it onto the battlefield transformed after it resolves. Exile it if it would leave the battlefield or not resolve.)

Target player discards two cards unless they discard a noncreature, nonland card.

Remove all counters from target permanent with counters. If it's a creature or enchantment, destroy it.

Enchant creature
Enchanted creature gets -X/-X, where X is 1 plus the number of counters on it.

Return target creature card with mana value 5 or less from your graveyard to the battlefield.
Metamorph {B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up and cast it at any time for its metamorph cost.)

[+2]: Up to one target creature gains deathtouch until your next upkeep.
[–3]: Target player sacrifices a creature and discards a card.
[–8]: Exile all creature cards from all graveyards, then create an X/X black Horror creature token with indestructible, where X is the total power of creatures exiled this way.