Swamp

Black Sun's Zenith

Put X -1/-1 counters on each creature. Shuffle Black Sun's Zenith into its owner's library.

Mox Diamond

If this artifact would enter, you may discard a land card instead. If you do, put this artifact onto the battlefield. If you don't, put it into its owner's graveyard.
{T}: Add one mana of any color.

Diabolic Edict

Target player sacrifices a creature of their choice.

Dark Ritual

Damnation

Destroy all creatures. They can't be regenerated.

Chimeric Idol

{0}: Tap all lands you control. This artifact becomes a 3/3 Turtle artifact creature until end of turn.

Thoughtseize

Target player reveals their hand. You choose a nonland card from it. That player discards that card. You lose 2 life.

Hymn to Tourach

Target player discards two cards at random.

Phyrexian Totem

{T}: Add {B}.
{2}{B}: This artifact becomes a 5/5 black Phyrexian Horror artifact creature with trample until end of turn.
Whenever this permanent is dealt damage, if it's a creature, sacrifice that many permanents.

Nether Spirit

At the beginning of your upkeep, if this card is the only creature card in your graveyard, you may return this card to the battlefield.

Smallpox

Each player loses 1 life, discards a card, sacrifices a creature of their choice, then sacrifices a land of their choice.

Bloodghast

This creature can't block.
This creature has haste as long as an opponent has 10 or less life.
Landfall — Whenever a land you control enters, you may return this card from your graveyard to the battlefield.