Oubliette

Select a creature in play when Oubliette is cast. That creature is considered out of play as long as Oubliette is in play. Hence the creature cannot be the target of spells and cannot receive damage, use special powers, attack, or defend. All counters and enchantments on the creature remain but are also out of play. If Oubliette is removed, creature returns to play tapped.

Chittering Rats

When Chittering Rats comes into play, target opponent puts a card from his or her hand on top of his or her library.

Sign in Blood

Cuombajj Witches

{T}: Cuombajj Witches deals 1 damage to target creature or player. Cuombajj Witches also deals 1 damage to target creature or player of target opponent's choice. Choose your target first.

Nihil Spellbomb

{T}, Sacrifice Nihil Spellbomb: Exile all cards from target player's graveyard. When Nihil Spellbomb is put into a graveyard from the battlefield, you may pay {B}. If you do, draw a card.

Tendrils of Corruption

Tendrils of Corruption deals X damage to target creature and you gain X life, where X is the number of Swamps you control.

Chainer's Edict

Target player sacrifices a creature. Flashback {5}{B}{B} (You may play this card from your graveyard for its flashback cost. Then remove it from the game.)

Pestilence

At the end of each turn, if no creatures are in play, sacrifice Pestilence. {B}: Pestilence deals 1 damage to each creature and player.

Crypt Rats

{X}: Crypt Rats deals X damage to each creature and player. Spend only black mana in this way.

Bojuka Bog

Bojuka Bog enters the battlefield tapped. When Bojuka Bog enters the battlefield, exile all cards from target player's graveyard. {T}: Add {B} to your mana pool.

Barren Moor

Phyrexian Rager

Disfigure

Target creature gets -2/-2 until end of turn.

Gray Merchant of Asphodel

When Gray Merchant of Asphodel enters the battlefield, each opponent loses X life, where X is your devotion to black. You gain life equal to the life lost this way. (Each {B} in the mana costs of permanents you control counts toward your devotion to black.)