Mourning Thrull

({W/B} can be paid with either {W} or {B}.)
Flying
Whenever Mourning Thrull deals damage, you gain that much life.

Daggerclaw Imp

Seal of Doom

Sacrifice Seal of Doom: Destroy target nonblack creature. It can't be regenerated.

Swamp

Mortify

Condemn

Put target attacking creature on the bottom of its owner's library. Its controller gains life equal to its toughness.

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 Cry of Contrition haunts dies, target player discards a card.

Belfry Spirit

Flying
Haunt (When this creature dies, exile it haunting target creature.)
When Belfry Spirit enters or the creature it haunts dies, create two 1/1 black Bat creature tokens with flying.

Keening Banshee

Flying
When Keening Banshee enters, target creature gets -2/-2 until end of turn.

Souls of the Faultless

Defender (This creature can't attack.)
Whenever Souls of the Faultless is dealt combat damage, you gain that much life and attacking player loses that much life.

Disembowel

Destroy target creature with mana value X.

Pillory of the Sleepless

Enchant creature
Enchanted creature can't attack or block.
Enchanted creature has "At the beginning of your upkeep, you lose 1 life."

Courier Hawk

Orzhov Basilica

Orzhov Basilica enters tapped.
When Orzhov Basilica enters, return a land you control to its owner's hand.
{T}: Add {W}{B}.

Bond of Agony

As an additional cost to cast this spell, pay X life.
Each other player loses X life.

Shrieking Grotesque

Flying
When Shrieking Grotesque enters, if {B} was spent to cast it, target player discards a card.

Hissing Miasma

Whenever a creature attacks you, its controller loses 1 life.

Blind Hunter

Flying
Haunt (When this creature dies, exile it haunting target creature.)
When Blind Hunter enters or the creature it haunts dies, target player loses 2 life and you gain 2 life.

Last Gasp

Target creature gets -3/-3 until end of turn.

Castigate

Target opponent reveals their hand. You choose a nonland card from it and exile that card.