Undying Beast

When Undying Beast dies, put it on top of its owner's library.

Divest

Target player reveals their hand. You choose an artifact or creature card from it. That player discards that card.

Distress

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

Augur of Skulls

{1}{B}: Regenerate Augur of Skulls.
Sacrifice Augur of Skulls: Target player discards two cards. Activate only during your upkeep.

Gix's Caress

Target opponent reveals their hand. You choose a nonland card from it. That player discards that card.
Create a tapped Powerstone token. (It's an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.")

Go for the Throat

Mind Burst

Target player discards X cards, where X is one plus the number of cards named Mind Burst in all graveyards.

Duress

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

Tasigur's Cruelty

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

Swamp

Cast Down

Mindstab

Target player discards three cards.
Suspend 4—{B} (Rather than cast this card from your hand, you may pay {B} and exile it with four time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost.)