Black Cat

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

Serrated Scorpion

When this creature dies, it deals 2 damage to each opponent and you gain 2 life.

Gixian Infiltrator

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

Murder

Bone Picker

This spell costs {3} less to cast if a creature died this turn.
Flying, deathtouch

Unearth

Return target creature card with mana value 3 or less from your graveyard to the battlefield.
Cycling {2} ({2}, Discard this card: Draw a card.)

Qarsi Sadist

Exploit (When this creature enters, you may sacrifice a creature.)
When this creature exploits a creature, target opponent loses 2 life and you gain 2 life.

Chainer's Edict

Target player sacrifices a creature of their choice.
Flashback {5}{B}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Elvish Doomsayer

When this creature dies, each opponent discards a card.

Sign in Blood

Target player draws two cards and loses 2 life.

Battlefly Swarm

Flying
{B}: This creature gains deathtouch until end of turn.

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.)

Village Rites

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

Cry of Contrition

Target player discards a card.
Haunt (When this spell card is put into a graveyard after resolving, exile it haunting target creature.)
When the creature this card haunts dies, target player discards a card.

Blood Beckoning

Kicker {3} (You may pay an additional {3} as you cast this spell.)
Return target creature card from your graveyard to your hand. If this spell was kicked, instead return two target creature cards from your graveyard to your hand.

Writhing Necromass

This spell costs {1} less to cast for each creature card in your graveyard.
Deathtouch

Gurmag Angler

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.)

Doomed Dissenter

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

Depraved Harvester

Desperate Farmer

Lifelink
When another creature you control dies, transform this creature.

Desperate Farmer // Depraved Harvester

Bone Splinters

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

Bladebrand

Target creature gains deathtouch until end of turn.
Draw a card.

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.)

Guul Draz Vampire

As long as an opponent has 10 or less life, this creature gets +2/+1 and has intimidate. (It can't be blocked except by artifact creatures and/or creatures that share a color with it.)

Dire Fleet Hoarder

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

Cursed Minotaur

Menace (This creature can't be blocked except by two or more creatures.)

Infernal Scarring

Enchant creature
Enchanted creature gets +2/+0 and has "When this creature dies, draw a card."

Awoken Demon

Ecstatic Awakener

{2}{B}, Sacrifice another creature: Draw a card, then transform this creature. Activate only once each turn.

Ecstatic Awakener // Awoken Demon

Swamp

Clawing Torment

Enchant artifact or creature
As long as enchanted permanent is a creature, it gets -1/-1 and can't block.
Enchanted permanent has "At the beginning of your upkeep, you lose 1 life."

Morkrut Behemoth

As an additional cost to cast this spell, sacrifice a creature or pay {1}{B}.
Menace (This creature can't be blocked except by two or more creatures.)

Cast Down

Vermin Gorger

{T}, Sacrifice another creature: Each opponent loses 2 life and you gain 2 life.

Lotleth Giant

Undergrowth — When this creature enters, it deals 1 damage to target opponent for each creature card in your graveyard.