When Abyssal Gatekeeper dies, each player sacrifices a creature.

As an additional cost to cast this spell, sacrifice a creature.

Draw two cards.

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

Artillerize deals 5 damage to any target.

When Ashen-Skin Zubera dies, target opponent discards a card for each Zubera that died this turn.

Sacrifice a creature: Add {C}{C}.

When Black Cat dies, target opponent discards a card at random.

Bloodfell Caves enters the battlefield tapped.

When Bloodfell Caves enters the battlefield, you gain 1 life.

{T}: Add {B} or {R}.

Enchant creature you control

{R}, Sacrifice enchanted creature: Bloodfire Infusion deals damage equal to the sacrificed creature's power to each creature.

Sacrifice another creature: Until end of turn, Bogardan Dragonheart becomes a Dragon with base power and toughness 4/4, flying, and haste.

Bojuka Bog enters the battlefield tapped.

When Bojuka Bog enters the battlefield, exile target player's graveyard.

{T}: Add {B}.

When Burglar Rat enters the battlefield, each opponent discards a card.

As an additional cost to cast this spell, sacrifice a creature.

Add X mana in any combination of {B} and/or {R}, where X is the sacrificed creature's mana value.

Carrion Feeder can't block.

Sacrifice a creature: Put a +1/+1 counter on Carrion Feeder.

Cinder Barrens enters the battlefield tapped.

{T}: Add {B} or {R}.

As an additional cost to cast this spell, sacrifice a creature.

Collateral Damage deals 3 damage to any target.

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

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

Draw two cards.

Each player sacrifices a permanent.

As an additional cost to cast this spell, sacrifice a creature.

Add {B}{B}{B}{B}.

Until end of turn, target creature gets +2/+0 and gains "When this creature dies, return it to the battlefield under its owner's control."

When Dire Fleet Hoarder dies, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

When Discordant Piper dies, create a 0/1 white Goat creature token.

When Doomed Dissenter dies, create a 2/2 black Zombie creature token.

Defender

When Dragon Egg dies, create a 2/2 red Dragon creature token with flying and "{R}: This creature gets +1/+0 until end of turn."

When Dusk Legion Zealot enters the battlefield, you draw a card and you lose 1 life.

When Elvish Doomsayer dies, each opponent discards a card.

{T}, Sacrifice Evolving Wilds: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Flying

Whenever Falkenrath Noble or another creature dies, target player loses 1 life and you gain 1 life.

When Filigree Familiar enters the battlefield, you gain 2 life.

When Filigree Familiar dies, draw a card.

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

As an additional cost to cast this spell, sacrifice a creature.

Fling deals damage equal to the sacrificed creature's power to any target.

When Footlight Fiend dies, it deals 1 damage to any target.

Defender

When Gleaming Barrier dies, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

When Goblin Arsonist dies, you may have it deal 1 damage to any target.

When Goblin Instigator enters the battlefield, create a 1/1 red Goblin creature token.

First strike

When Grim Initiate dies, amass 1. (Put a +1/+1 counter on an Army you control. If you don't control one, create a 0/0 black Zombie Army creature token first.)

As an additional cost to cast this spell, sacrifice a creature or planeswalker.

Heartfire deals 4 damage to any target.

Whenever another creature dies, you may have Hissing Iguanar deal 1 damage to target player or planeswalker.

When Impulsive Pilferer dies, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

Encore {3}{R} ({3}{R}, Exile this card from your graveyard: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)

Each player sacrifices a creature.

Whenever you sacrifice a permanent, put a +1/+1 counter on Juri, Master of the Revue.

When Juri dies, it deals damage equal to its power to any target.

Enchant creature or planeswalker you control

When enchanted permanent dies or is put into exile, return that card to the battlefield under your control.

When Lazotep Reaver enters the battlefield, amass 1. (Put a +1/+1 counter on an Army you control. If you don't control one, create a 0/0 black Zombie Army creature token first.)

As an additional cost to cast this spell, sacrifice a creature or land.

Draw two cards.

When Mesmeric Fiend enters the battlefield, target opponent reveals their hand and you choose a nonland card from it. Exile that card.

When Mesmeric Fiend leaves the battlefield, return the exiled card to its owner's hand.

Echo {1}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

When Mogg War Marshal enters the battlefield or dies, create a 1/1 red Goblin creature token.

Whenever a player sacrifices a creature, you may put a +1/+1 counter on Mortician Beetle.

When Mudbutton Torchrunner dies, it deals 3 damage to any target.

This spell has flash as long as you control a permanent with flash.

As an additional cost to cast this spell, sacrifice a creature.

Destroy target creature.

When Myr Sire dies, create a 1/1 colorless Phyrexian Myr artifact creature token.

When Perilous Myr dies, it deals 2 damage to any target.

When Phyrexian Rager enters the battlefield, you draw a card and you lose 1 life.

Rakdos Carnarium enters the battlefield tapped.

When Rakdos Carnarium enters the battlefield, return a land you control to its owner's hand.

{T}: Add {B}{R}.

Rakdos Guildgate enters the battlefield tapped.

{T}: Add {B} or {R}.

When Ravenous Rats enters the battlefield, target opponent discards a card.

As an additional cost to cast this spell, sacrifice a creature.

Reckless Abandon deals 4 damage to any target.

Deathtouch

When Ruin Rat dies, exile target card from an opponent's graveyard.

Enchant creature

Whenever a creature dies, put a +1/+1 counter on enchanted creature.

When Serrated Scorpion dies, it deals 2 damage to each opponent and you gain 2 life.

As an additional cost to cast this spell, sacrifice a creature.

You gain life equal to the sacrificed creature's toughness. Destroy target creature an opponent controls.

As an additional cost to cast this spell, sacrifice a land.

Shard Volley deals 3 damage to any target.

As an additional cost to cast this spell, sacrifice a creature.

Draw two cards.

When Slum Reaper enters the battlefield, each player sacrifices a creature.

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

As an additional cost to cast this spell, sacrifice a creature or pay {3}{B}.

Destroy target creature or planeswalker.

({T}: Add {B} or {R}.)

Sulfurous Mire enters the battlefield tapped.

Until end of turn, target creature gets +2/+0 and gains "When this creature dies, return it to the battlefield tapped under its owner's control."

As an additional cost to cast this spell, sacrifice a creature.

Target opponent discards two cards.

{T}, Sacrifice Terramorphic Expanse: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Thriving Bluff enters the battlefield tapped.

As Thriving Bluff enters the battlefield, choose a color other than red.

{T}: Add {R} or one mana of the chosen color.

Thriving Moor enters the battlefield tapped.

As Thriving Moor enters the battlefield, choose a color other than black.

{T}: Add {B} or one mana of the chosen color.

Kicker--Sacrifice a creature. (You may sacrifice a creature in addition to any other costs as you cast this spell.)

Target creature gets -2/-2 until end of turn. If this spell was kicked, that creature gets -5/-5 until end of turn instead.

As an additional cost to cast this spell, sacrifice a creature.

Draw two cards.

Sacrifice a creature: Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

Whenever Warteye Witch or another creature you control dies, scry 1.