Choking Sands

Destroy target non-Swamp land. If that land was nonbasic, Choking Sands deals 2 damage to the land's controller.

Chainer's Edict

Target player sacrifices a creature of their choice.
Flashback {5}{B}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Befoul

Destroy target land or nonblack creature. It can't be regenerated.

Rancid Earth

Destroy target land.
Threshold — If seven or more cards are in your graveyard, instead destroy that land and Rancid Earth deals 1 damage to each creature and each player.

Icequake

Destroy target land. If that land was a snow land, Icequake deals 1 damage to that land's controller.

Cemetery Gate

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

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.

Troll of Khazad-dûm

This creature can't be blocked except by three or more creatures.
Swampcycling {1} ({1}, Discard this card: Search your library for a Swamp card, reveal it, put it into your hand, then shuffle.)

Chittering Rats

When this creature enters, target opponent puts a card from their hand on top of their library.

Barren Moor

This land enters tapped.
{T}: Add {B}.
Cycling {B} ({B}, Discard this card: Draw a card.)

Dark Ritual

Thorn of the Black Rose

Deathtouch
When this creature enters, you become the monarch.

Pestilence

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

Bone Picker

This spell costs {3} less to cast if a creature died this turn.
Flying, deathtouch

Dusk Legion Zealot

When this creature enters, you draw a card and you lose 1 life.

Diabolic Edict

Target player sacrifices a creature of their choice.

Night's Whisper

Sign in Blood

Target player draws two cards and loses 2 life.

Peat Bog

This land enters tapped with two depletion counters on it.
{T}, Remove a depletion counter from this land: Add {B}{B}. If there are no depletion counters on this land, sacrifice it.

Swamp

Feed the Swarm

Destroy target creature or enchantment an opponent controls. You lose life equal to that permanent's mana value.

Radiant Fountain

When this land enters, you gain 2 life.
{T}: Add {C}.

Snuff Out

If you control a Swamp, you may pay 4 life rather than pay this spell's mana cost.
Destroy target nonblack creature. It can't be regenerated.

Gurmag Angler

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

Crypt Rats

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