Organ Harvest

Your team may sacrifice any number of creatures. For each creature sacrificed this way, you add {B}{B}.

Breeding Pit

At the beginning of your upkeep, sacrifice this enchantment unless you pay {B}{B}.
At the beginning of your end step, create a 0/1 black Thrull creature token.

Unerring Sling

{3}, {T}, Tap an untapped creature you control: This artifact deals damage equal to the tapped creature's power to target attacking or blocking creature with flying.

Feral Shadow

Infernal Spawn of Evil

Flying, first strike
{1}{B}, Reveal this card from your hand, Say "It's coming": This card deals 1 damage to target opponent or planeswalker. Activate only during your upkeep and only once each turn.

Swamp

Breathstealer

{B}: This creature gets +1/-1 until end of turn.

Handcuffs

As this enchantment enters, choose a player.
When the chosen player's hands aren't touching each other, sacrifice this enchantment and that player sacrifices three permanents.

Dark Ritual

Will-o'-the-Wisp

Flying (This creature can't be blocked except by creatures with flying or reach.)
{B}: Regenerate this creature. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

Drain Life

Spend only black mana on X.
Drain Life deals X damage to any target. You gain life equal to the damage dealt, but not more life than the player's life total before the damage was dealt, the planeswalker's loyalty before the damage was dealt, or the creature's toughness.

Whalebone Glider

{2}, {T}: Target creature with power 3 or less gains flying until end of turn.

Fledgling Djinn

Flying
At the beginning of your upkeep, this creature deals 1 damage to you.

Unholy Strength

Enchant creature
Enchanted creature gets +2/+1.

Spirit of the Night

Flying, trample, haste, protection from black
Spirit of the Night has first strike as long as it's attacking.

Soldevi Adnate

{T}, Sacrifice a black or artifact creature: Add an amount of {B} equal to the sacrificed creature's mana value.

Ersatz Gnomes

{T}: Target spell becomes colorless.
{T}: Target permanent becomes colorless until end of turn.

Cemetery Gate

Defender (This creature can't attack.)
Protection from black

Enfeeblement

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)
Enchanted creature gets -2/-2.

Nocturnal Raid

Black creatures get +2/+0 until end of turn.

Urborg Panther

{B}, Sacrifice this creature: Destroy target creature blocking it.
Sacrifice a creature named Feral Shadow, a creature named Breathstealer, and this creature: Search your library for a card named Spirit of the Night, put that card onto the battlefield, then shuffle.

Skull Catapult

{1}, {T}, Sacrifice a creature: This artifact deals 2 damage to any target.

Catacomb Dragon

Flying
Whenever this creature becomes blocked by a nonartifact, non-Dragon creature, that creature gets -X/-0 until end of turn, where X is half the creature's power, rounded down.