When Abyssal Gatekeeper dies, each player sacrifices a creature.

Flying

At the beginning of each opponent's end step, that player chooses up to two creatures they control, then sacrifices the rest.

Flying

Whenever Archon of Cruelty enters the battlefield or attacks, target opponent sacrifices a creature or planeswalker, discards a card, and loses 3 life. You draw a card and gain 3 life.

When you cast this spell, any player may sacrifice a creature. If a player does, counter Brain Gorgers.

Madness {1}{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.)

Flying

Whenever Butcher of Malakir or another creature you control dies, each opponent sacrifices a creature.

Choose a nonland card name. Target player reveals their hand and discards all cards with that name.

Flashback--Sacrifice a creature. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

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

When Carrier Thrall dies, create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this creature: Add {C}."

Lifelink

When Cavalier of Night enters the battlefield, you may sacrifice another creature. When you do, destroy target creature an opponent controls.

When Cavalier of Night dies, return target creature card with mana value 3 or less from your graveyard to the battlefield.

Target player sacrifices a creature.

Flashback {5}{B}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Target player sacrifices a creature. 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.)

Target opponent sacrifices a creature.

Enchant player

At the beginning of enchanted player's upkeep, that player sacrifices a creature or planeswalker. If the player can't, they lose 5 life.

Search your library for a card, then shuffle and put that card on top. You lose 2 life.

Target player sacrifices half the permanents they control, rounded down.

Suspend 2--{2}{B}{B} (Rather than cast this card from your hand, you may pay {2}{B}{B} and exile it with two time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, cast it without paying its mana cost.)

At the beginning of each player's upkeep, if Curse of the Cabal is suspended, that player may sacrifice a permanent. If the player does, put two time counters on Curse of the Cabal.

Add {B}{B}{B}.

Flying, trample

Whenever Demon of Loathing deals combat damage to a player, that player sacrifices a creature.

Flying

Lieutenant -- As long as you control your commander, Demon of Wailing Agonies gets +2/+2 and has "Whenever Demon of Wailing Agonies deals combat damage to a player, that player sacrifices a creature."

When Demon's Disciple enters the battlefield, each player sacrifices a creature or planeswalker.

Flying

At the beginning of each combat, any opponent may sacrifice a creature. If a player does, tap Desecration Demon and put a +1/+1 counter on it.

Target player sacrifices a creature, then gains life equal to that creature's toughness.

Target player sacrifices a creature.

Flash

Whenever a creature you control dies, each opponent sacrifices a creature.

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

When Elderfang Disciple enters the battlefield, each opponent discards a card.

Whenever you cast a creature spell, create X 1/1 black Thrull creature tokens, where X is that spell's mana value.

When you control seven or more Thrulls, sacrifice Endrek Sahr, Master Breeder.

When Fleshbag Marauder enters the battlefield, each player sacrifices a creature.

Each player loses half their life, then discards half the cards in their hand, then sacrifices half the creatures they control. Round up each time.

Choose one --

• Target player discards a card.

• Target creature gets +2/-1 until end of turn.

• Target creature gains swampwalk until end of turn. (It can't be blocked as long as defending player controls a Swamp.)

Enchant creature

When enchanted creature leaves the battlefield, its controller sacrifices a creature.

Kicker {B} (You may pay an additional {B} as you cast this spell.)

When Gatekeeper of Malakir enters the battlefield, if it was kicked, target player sacrifices a creature.

Target player sacrifices a creature and loses 1 life.

Whenever a creature you control dies, each other player sacrifices a creature.

Until end of turn, permanents your opponents control gain "When this permanent deals damage to the player who cast Hellish Rebuke, sacrifice this permanent. You lose 2 life."

Exile Ill-Gotten Gains. Each player discards their hand, then returns up to three cards from their graveyard to their hand.

At the beginning of your upkeep, Ill-Gotten Inheritance deals 1 damage to each opponent and you gain 1 life.

{5}{B}, Sacrifice Ill-Gotten Inheritance: It deals 4 damage to target opponent and you gain 4 life.

Flying

At the beginning of your upkeep, draw a card unless target opponent sacrifices a creature or pays 3 life.

Enchant creature

Enchanted creature has "At the beginning of your upkeep, sacrifice a creature."

Choose an opponent. You and that player each sacrifice a creature. Each player who sacrificed a creature this way draws two cards.

Choose an opponent. Return a creature card from your graveyard to the battlefield, then that player returns a creature card from their graveyard to the battlefield.

Each player sacrifices a creature.

For each creature, its controller sacrifices it unless they pay X life.

Flying, haste

Whenever Rankle, Master of Pranks deals combat damage to a player, choose any number --

• Each player discards a card.

• Each player loses 1 life and draws a card.

• Each player sacrifices a creature.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

At the beginning of your upkeep, return target creature card from your graveyard to the battlefield.

At the beginning of each opponent's upkeep, that player sacrifices a creature.

Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.)

Target player sacrifices a creature.

Whenever another creature dies, or a creature card is put into a graveyard from anywhere other than the battlefield, or a creature card leaves your graveyard, Syr Konrad, the Grim deals 1 damage to each opponent.

{1}{B}: Each player mills a card. (They each put the top card of their library into their graveyard.)

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.

{T}: Target player loses 3 life unless they sacrifice a nonland permanent or discard a card.

{3}{B}: Untap Tergrid's Lantern.

Flying, lifelink

Whenever The Haunt of Hightower attacks, defending player discards a card.

Whenever a card is put into an opponent's graveyard from anywhere, put a +1/+1 counter on The Haunt of Hightower.

Kicker {B}{B} (You may pay an additional {B}{B} as you cast this spell.)

Protection from white

Whenever an opponent discards a card, put a +1/+1 counter on Tourach, Dread Cantor.

When Tourach enters the battlefield, if it was kicked, target opponent discards two cards at random.

At the beginning of your upkeep, target opponent discards a card if you control the creature with the greatest power or tied for the greatest power.