msem-instigator

This spell costs {2} less to cast if you control a Rogue.
Target opponent discards two cards.

Enchant opponent
When Down with the Ship enters, enchanted player discards a card unless they sacrifice a creature.
{1}{B}, Sacrifice Down with the Ship: Return target creature card from your graveyard to your hand.

Menace
Whenever Dragon's Twisted Shadow attacks and isn't blocked, it gets +4/+0 until end of turn.

Drakon Nightshade can't block.
When Drakon Nightshade dies, scry 1.

Target creature gets -2/-1 until end of turn. When it dies this turn, its controller loses 5 life.

{1}, Sacrifice another creature: Put a +1/+1 counter on Dread Cabalist and on up to one target legendary creature. Activate only as a sorcery.

This spell costs {1} less to cast for each card put into your graveyard from anywhere this turn.
At the beginning of each player's upkeep, that player loses 1 life, discards a card, and sacrifices a creature.

Deathtouch
Whenever Dreadful Gorgon attacks, target attacking creature with lesser power gains deathtouch until end of turn.

Flying
When Dreadworld Demon enters, each opponent may have you draw a card. Each player who doesn't loses 3 life. You gain life equal to the life lost this way.

Whenever a spell or ability causes an opponent to draw a card, draw a card unless that player pays 1 life.

{1}{B}, Mill three cards: Return Dredging Aberration from your graveyard to your hand.

Return up to one target creature card from your graveyard to the battlefield tapped. You gain 2 life.
Tether (Then if you cast this from your hand, you may exile it tethered to a creature you control. When it dies, you may cast this from exile without paying its mana cost.)

When Dregscape Wretch dies, create a 2/2 black Zombie creature token.

When Driver of Hordes enters, create a tapped 2/2 black Zombie creature token.
Unearth {3}{B} ({3}{B}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the end step or if it would leave the battlefield. Unearth only as a sorcery.)

This spell costs {X} less to cast, where X is the number of card types among cards in your graveyard.
Surveil 3, then you draw three cards. You lose 3 life.

{T}, Sacrifice a creature or land: Search your library for a Swamp card, reveal it, put it into your hand, then shuffle.

Landfall — Whenever a land you control enters, target player loses 1 life and you gain 1 life.

Target player reveals their hand. You choose a nonland card from it. That player discards that card, then mills four cards.

All creatures get -2/-2 until end of turn. Scry 1.

Target creature gets -3/-3 until end of turn.

Deathtouch
At the beginning of each opponent's upkeep, that player loses 1 life.

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

Lifelink
Vanishing 1 (This creature enters with a time counter on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
Whenever another creature you control dies, put a time counter on Dulling Necromancer.

Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.

When Dusk Lieutenant enters, forebode. (Create a tapped colorless Omen artifact token with “{T}, Discard a card, Sacrifice this artifact: Draw a card.”)
Once each turn, when you discard a card during your turn, each opponent discards a card.