Bottomless Pit

At the beginning of each player's upkeep, that player discards a card at random.

Dystopia

Cumulative upkeep—Pay 1 life. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
At the beginning of each player's upkeep, that player sacrifices a green or white permanent of their choice.

Skittering Skirge

Flying
When you cast a creature spell, sacrifice this creature.

Swamp

Tormod's Crypt

{T}, Sacrifice this artifact: Exile target player's graveyard.

Withered Wretch

Don't Have

Cursed Scroll

{3}, {T}: Choose a card name, then reveal a card at random from your hand. If that card has the chosen name, this artifact deals 2 damage to any target.

Wasteland

{T}: Add {C}.
{T}, Sacrifice this land: Destroy target nonbasic land.

Perish

Destroy all green creatures. They can't be regenerated.

Gloom

White spells cost {3} more to cast.
Activated abilities of white enchantments cost {3} more to activate.

Engineered Plague

As this enchantment enters, choose a creature type.
All creatures of the chosen type get -1/-1.

Funeral Charm

Choose one —
• Target player discards a card.
• Target creature gets +2/-1 until end of turn.
• Target creature gains swampwalk until end of turn. (It can't be blocked as long as defending player controls a Swamp.)

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.

Spinning Darkness

You may exile the top three black cards of your graveyard rather than pay this spell's mana cost.
Spinning Darkness deals 3 damage to target nonblack creature. You gain 3 life.

Mishra's Factory

{T}: Add {C}.
{1}: This land becomes a 2/2 Assembly-Worker artifact creature until end of turn. It's still a land.
{T}: Target Assembly-Worker creature gets +1/+1 until end of turn.

Dark Ritual

Planar Void

Whenever another card is put into a graveyard from anywhere, exile that card.

Diabolic Edict

Target player sacrifices a creature of their choice.

Chain of Smog

Target player discards two cards. That player may copy this spell and may choose a new target for that copy.

Hypnotic Specter

Flying
Whenever this creature deals damage to an opponent, that player discards a card at random.

Ravenous Rats

When this creature enters, target opponent discards a card.

Cursed Totem

Activated abilities of creatures can't be activated.

Megrim

Whenever an opponent discards a card, this enchantment deals 2 damage to that player.

The Rack

As this artifact enters, choose an opponent.
At the beginning of the chosen player's upkeep, this artifact deals X damage to that player, where X is 3 minus the number of cards in their hand.

Duress

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