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

When Dusk Legion Zealot enters the battlefield, you draw a card and you lose 1 life.

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.)

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

When Ravenous Rats enters the battlefield, target opponent discards a card.

As an additional cost to cast this spell, sacrifice an artifact or creature. Draw two cards and create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

Target creature gets -1/-1 until end of turn for each Swamp you control.

Bojuka Bog enters the battlefield tapped. When Bojuka Bog enters the battlefield, exile target player's graveyard. {T}: Add {B}.

Corrupt deals damage to any target equal to the number of Swamps you control. You gain life equal to the damage dealt this way.

Target player draws two cards and loses 2 life.

Destroy target nonlegendary creature.

Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.

Target player sacrifices a creature and loses 1 life.

Flying When Liliana's Specter enters the battlefield, each opponent discards a card.

All creatures get -1/-1 until end of turn.

{T}, Sacrifice Nihil Spellbomb: Exile 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.