Abyssal Gorestalker

When this creature enters, each player sacrifices two creatures of their choice.

Cruel Edict

Target opponent sacrifices a creature of their choice.

Swamp

Blood Seeker

Whenever a creature an opponent controls enters, you may have that player lose 1 life.

Chain Devil

Animate Chains — When this creature enters, each player sacrifices a nontoken creature of their choice.

Crawlspace

No more than two creatures can attack you each combat.

Gruesome Discovery

Target player discards two cards.
Morbid — If a creature died this turn, instead that player reveals their hand, you choose two cards from it, then that player discards those cards.

Harsh Scrutiny

Target opponent reveals their hand. You choose a creature card from it. That player discards that card. Scry 1.

Call to the Grave

At the beginning of each player's upkeep, that player sacrifices a non-Zombie creature of their choice.
At the beginning of the end step, if no creatures are on the battlefield, sacrifice this enchantment.

Diabolic Edict

Target player sacrifices a creature of their choice.

Basilisk Collar

Equipped creature has deathtouch and lifelink. (Any amount of damage it deals to a creature is enough to destroy it. Damage dealt by this creature also causes you to gain that much life.)
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

Creeping Dread

At the beginning of your upkeep, each player discards a card. Each opponent who discarded a card that shares a card type with the card you discarded loses 3 life. (Players reveal the discarded cards simultaneously.)

Braids's Frightful Return

Read ahead (Choose a chapter and start with that many lore counters. Add one after your draw step. Skipped chapters don't trigger. Sacrifice after III.)
I — You may sacrifice a creature. If you do, each opponent discards a card.
II — Return target creature card from your graveyard to your hand.
III — Target opponent may sacrifice a nonland, nontoken permanent of their choice. If they don't, they lose 2 life and you draw a card.

Abyssal Gatekeeper

When this creature dies, each player sacrifices a creature of their choice.

Abyssal Horror

Flying
When this creature enters, target player discards two cards.

Distress

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

Arcane Signet

{T}: Add one mana of any color in your commander's color identity.

Chrome Cat

Abyssal Nocturnus

Whenever an opponent discards a card, this creature gets +2/+2 and gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)

Bontu's Monument

Black creature spells you cast cost {1} less to cast.
Whenever you cast a creature spell, each opponent loses 1 life and you gain 1 life.

Gibbering Descent

At the beginning of each player's upkeep, that player loses 1 life and discards a card.
Hellbent — Skip your upkeep step if you have no cards in hand.
Madness {2}{B}{B} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Caustic Hound

When this creature dies, each player loses 4 life.

Black Cat

When this creature dies, target opponent discards a card at random.

Dragon's Claw

Whenever a player casts a red spell, you may gain 1 life.

Abyssal Specter

Flying
Whenever this creature deals damage to a player, that player discards a card.

Davriel, Rogue Shadowmage

At the beginning of each opponent's upkeep, if that player has one or fewer cards in hand, Davriel deals 2 damage to them.
−1: Target player discards a card.

Bad Moon

Sol Ring

Alley Grifters

Whenever this creature becomes blocked, defending player discards a card.

Bad Deal

You draw two cards and each opponent discards two cards. Each player loses 2 life.

Gorgon's Head

Equipped creature has deathtouch.
Equip {2}

Burglar Rat

When this creature enters, each opponent discards a card.

Dredge the Mire

Each opponent chooses a creature card in their graveyard. Put those cards onto the battlefield under your control.

Elvish Doomsayer

When this creature dies, each opponent discards a card.

Arcane Encyclopedia

Elderfang Disciple

Fell Specter

Flying
When this creature enters, target opponent discards a card.
Whenever an opponent discards a card, that player loses 2 life.

Arterial Flow

Each opponent discards two cards. If you control a Vampire, each opponent loses 2 life and you gain 2 life.

Delirium Skeins

Capital Punishment

Council's dilemma — Starting with you, each player votes for death or taxes. Each opponent sacrifices a creature of their choice for each death vote and discards a card for each taxes vote.

Fugue

Fleshbag Marauder

When this creature enters, each player sacrifices a creature of their choice.

Grave Exchange

Return target creature card from your graveyard to your hand. Target player sacrifices a creature of their choice.

Davriel's Shadowfugue

Target player discards two cards and loses 2 life.

Burnished Hart

{3}, Sacrifice this creature: Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

Geth's Verdict

Target player sacrifices a creature of their choice and loses 1 life.

Tergrid's Lantern

{T}: Target player loses 3 life unless they sacrifice a nonland permanent of their choice or discard a card.
{3}{B}: Untap Tergrid's Lantern.

Tergrid, God of Fright

Menace
Whenever an opponent sacrifices a nontoken permanent or discards a permanent card, you may put that card from a graveyard onto the battlefield under your control.

Tergrid, God of Fright // Tergrid's Lantern

Dark Deal

Each player discards all the cards in their hand, then draws that many cards minus one.

Deadbridge Shaman

When this creature dies, target opponent discards a card.

Haunting Hymn

Target player discards two cards. If you cast this spell during your main phase, that player discards four cards instead.

Cerebral Confiscation

Choose one —
• Target opponent discards two cards.
• Target opponent reveals their hand. You choose a nonland card from it. That player discards that card.

Bellowing Mauler

At the beginning of your end step, each player loses 4 life unless they sacrifice a nontoken creature of their choice.

Awaken the Erstwhile

Each player discards all the cards in their hand, then creates that many 2/2 black Zombie creature tokens.

Geth's Grimoire

Whenever an opponent discards a card, you may draw a card.

Etched Familiar

When this creature dies, each opponent loses 2 life and you gain 2 life.

Butcher of Malakir

Flying
Whenever this creature or another creature you control dies, each opponent sacrifices a creature of their choice.

Archetype of Finality

Creatures you control have deathtouch.
Creatures your opponents control lose deathtouch and can't have or gain deathtouch.

Assassin's Strike

Destroy target creature. Its controller discards a card.

Consuming Vapors

Target player sacrifices a creature of their choice. You gain life equal to that creature's toughness.
Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)

Cackling Fiend

Barter in Blood

Each player sacrifices two creatures of their choice.

Corrupt Court Official

When this creature enters, target opponent discards a card.

Anowon, the Ruin Sage

At the beginning of your upkeep, each player sacrifices a non-Vampire creature of their choice.

Feral Abomination

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)