Initiates of the Ebon Hand

{1}: Add {B}. If this ability has been activated four or more times this turn, sacrifice this creature at the beginning of the next end step.

Bone Splinters

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

Accursed Marauder

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

Sign in Blood

Target player draws two cards and loses 2 life.

Persistent Specimen

{2}{B}: Return this card from your graveyard to the battlefield tapped.

Diresight

Surveil 2, then draw two cards. You lose 2 life. (To surveil 2, look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

Accursed Centaur

When this creature enters, sacrifice a creature.

Gingerbrute

Haste (This creature can attack and {T} as soon as it comes under your control.)
{1}: This creature can't be blocked this turn except by creatures with haste.
{2}, {T}, Sacrifice this creature: You gain 3 life.

Butcher Ghoul

Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)

Blightbelly Rat

Toxic 1 (Players dealt combat damage by this creature also get a poison counter.)
When this creature dies, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Fume Spitter

Sacrifice this creature: Put a -1/-1 counter on target creature.

Blood Pact

Shred Memory

Exile up to four target cards from a single graveyard.
Transmute {1}{B}{B} ({1}{B}{B}, Discard this card: Search your library for a card with the same mana value as this card, reveal it, put it into your hand, then shuffle. Transmute only as a sorcery.)

Night's Whisper

Phyrexian Vivisector

Whenever a creature you control dies, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Hand of Emrakul

You may sacrifice four Eldrazi Spawn rather than pay this spell's mana cost.
Annihilator 1 (Whenever this creature attacks, defending player sacrifices a permanent of their choice.)

Mordor Muster

You draw a card and you lose 1 life.
Amass Orcs 1. (Put a +1/+1 counter on an Army you control. It's also an Orc. If you don't control an Army, create a 0/0 black Orc Army creature token first.)

Ulamog's Crusher

Annihilator 2 (Whenever this creature attacks, defending player sacrifices two permanents of their choice.)
This creature attacks each combat if able.

Bloodthrone Vampire

Sacrifice a creature: This creature gets +2/+2 until end of turn.

Witch's Cauldron

{1}{B}, {T}, Sacrifice a creature: You gain 1 life and draw a card.

Dusk Legion Zealot

When this creature enters, you draw a card and you lose 1 life.

Forever Young

Put any number of target creature cards from your graveyard on top of your library.
Draw a card.

Viscera Seer

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

Gixian Infiltrator

Whenever you sacrifice another permanent, put a +1/+1 counter on this creature.

Bone Shards

As an additional cost to cast this spell, sacrifice a creature or discard a card.
Destroy target creature or planeswalker.

Infestation Sage

When this creature dies, create a 1/1 black and green Insect creature token with flying.

Myr Scrapling

Sacrifice this creature: Put a +1/+1 counter on target creature.

Call to the Netherworld

Return target black creature card from your graveyard to your hand.
Madness {0} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Crypt Creeper

Sacrifice this creature: Exile target card from a graveyard.

Nested Shambler

When this creature dies, create X tapped 1/1 green Squirrel creature tokens, where X is this creature's power.

Silumgar Scavenger

Flying
Exploit (When this creature enters, you may sacrifice a creature.)
Whenever another creature you control dies, put a +1/+1 counter on this creature. It gains haste until end of turn if it exploited that creature.

Brain Weevil

Intimidate (This creature can't be blocked except by artifact creatures and/or creatures that share a color with it.)
Sacrifice this creature: Target player discards two cards. Activate only as a sorcery.

Skeletal Changeling

Changeling (This card is every creature type.)
{1}{B}: Regenerate this creature.

Phyrexian Denouncer

{T}, Sacrifice this creature: Target creature gets -1/-1 until end of turn.

Liliana's Steward

{T}, Sacrifice this creature: Target opponent discards a card. Activate only as a sorcery.

Wild-Field Scarecrow

Defender
{2}, Sacrifice this creature: Search your library for up to two basic land cards, reveal them, put them into your hand, then shuffle.

Death Cultist

Sacrifice this creature: Target player loses 1 life and you gain 1 life.

Death Denied

Return X target creature cards from your graveyard to your hand.

Yoke of the Damned

Enchant creature
When a creature dies, destroy enchanted creature.

Undying Evil

Target creature gains undying until end of turn. (When it dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)

Cabal Trainee

Sacrifice this creature: Target creature gets -2/-0 until end of turn.

Basal Thrull

{T}, Sacrifice this creature: Add {B}{B}.

Dutiful Attendant

When this creature dies, return another target creature card from your graveyard to your hand.

Gavony Unhallowed

Whenever another creature you control dies, put a +1/+1 counter on this creature.

Augur of Skulls

{1}{B}: Regenerate this creature.
Sacrifice this creature: Target player discards two cards. Activate only during your upkeep.

Blood Pet

Falkenrath Noble

Flying
Whenever this creature or another creature dies, target player loses 1 life and you gain 1 life.

Atrocious Experiment

Target player mills two cards, draws two cards, and loses 2 life. (To mill a card, a player puts the top card of their library into their graveyard.)

Eaten Alive

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

Macabre Waltz

Return up to two target creature cards from your graveyard to your hand, then discard a card.

Songs of the Damned

Add {B} for each creature card in your graveyard.

Bile Urchin

Sacrifice this creature: Target player loses 1 life.

Morbid Opportunist

Whenever one or more other creatures die, draw a card. This ability triggers only once each turn.

Carrier Thrall

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

Eternal Thirst

Enchant creature
Enchanted creature has lifelink and "Whenever a creature an opponent controls dies, put a +1/+1 counter on this creature." (Damage dealt by a creature with lifelink also causes its controller to gain that much life.)

Hungry Ghoul

{1}, Sacrifice another creature: Put a +1/+1 counter on this creature.

Cadaver Imp

Flying
When this creature enters, you may return target creature card from your graveyard to your hand.

Mortician Beetle

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

Demonic Stench

Each creature that blocked this turn gets -1/-1 until end of turn. (Then exile this card. You may cast the creature later from exile.)

Hezrou

Whenever one or more creatures you control become blocked, each blocking creature gets -1/-1 until end of turn.

Hezrou // Demonic Stench

Culling the Weak

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

Demonic Appetite

Enchant creature you control
Enchanted creature gets +3/+3.
At the beginning of your upkeep, sacrifice a creature.

Swamp

Pit Keeper

When this creature enters, if you have four or more creature cards in your graveyard, you may return target creature card from your graveyard to your hand.

Voracious Vermin

When this creature enters, create a 1/1 black Rat creature token with "This token can't block."
Whenever another creature you control dies, put a +1/+1 counter on this creature.

Innocent Blood

Each player sacrifices a creature of their choice.

Nezumi Linkbreaker

When this creature dies, create a 1/1 red Mercenary creature token with "{T}: Target creature you control gets +1/+0 until end of turn. Activate only as a sorcery."

Discordant Piper

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

Read the Bones

Scry 2, then draw two cards. You lose 2 life. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Sadistic Glee

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

Emergency Weld

Return target artifact or creature card from your graveyard to your hand. Create a 1/1 colorless Soldier artifact creature token.