Grave Pact

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

Withering Wisps

At the beginning of the end step, if no creatures are on the battlefield, sacrifice Withering Wisps.
{B}: Withering Wisps deals 1 damage to each creature and each player. Activate no more times each turn than the number of snow Swamps you control.

Songs of the Damned

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

Sadistic Glee

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

Fatal Blow

Destroy target creature that was dealt damage this turn. It can't be regenerated.

Black Market

Whenever a creature dies, put a charge counter on Black Market.
At the beginning of your first main phase, add {B} for each charge counter on Black Market.

Howl from Beyond

Target creature gets +X/+0 until end of turn.

Shade's Form

Enchant creature
Enchanted creature has "{B}: This creature gets +1/+1 until end of turn."
When enchanted creature dies, return that card to the battlefield under your control.

Swamp

Slaughter

Buyback—Pay 4 life. (You may pay 4 life in addition to any other costs as you cast this spell. If you do, put this card into your hand as it resolves.)
Destroy target nonblack creature. It can't be regenerated.

Sol'kanar the Swamp King

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
Whenever a player casts a black spell, you gain 1 life.

Smother

Destroy target creature with mana value 3 or less. It can't be regenerated.

Planeswalker's Scorn

{3}{B}: Target opponent reveals a card at random from their hand. Target creature gets -X/-X until end of turn, where X is the revealed card's mana value. Activate only as a sorcery.

Last Laugh

Whenever a permanent other than Last Laugh is put into a graveyard from the battlefield, Last Laugh deals 1 damage to each creature and each player.
When no creatures are on the battlefield, sacrifice Last Laugh.

Purraj of Urborg

Purraj of Urborg has first strike as long as it's attacking.
Whenever a player casts a black spell, you may pay {B}. If you do, put a +1/+1 counter on Purraj of Urborg.

False Cure

Until end of turn, whenever a player gains life, that player loses 2 life for each 1 life they gained.

Marsh Gas

All creatures get -2/-0 until end of turn.

Vampiric Embrace

Enchant creature
Enchanted creature gets +2/+2 and has flying.
Whenever a creature dealt damage by enchanted creature this turn dies, put a +1/+1 counter on that creature.

Coffin Purge

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

Dark Ritual

Nocturnal Raid

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

Diabolic Edict

Target player sacrifices a creature of their choice.

Cremate

Exile target card from a graveyard.
Draw a card.

Dredge

Sacrifice a creature or land.
Draw a card.

Scare Tactics

Creatures you control get +1/+0 until end of turn.

Simulacrum

You gain life equal to the damage dealt to you this turn. Simulacrum deals damage to target creature you control equal to the damage dealt to you this turn.

Pestilence

At the beginning of the end step, if no creatures are on the battlefield, sacrifice Pestilence.
{B}: Pestilence deals 1 damage to each creature and each player.