Teferi's Puzzle Box

At the beginning of each player's draw step, that player puts the cards in their hand on the bottom of their library in any order, then draws that many cards.

Aetherize

Return all attacking creatures to their owner's hand.

Leyline of the Void

If this card is in your opening hand, you may begin the game with it on the battlefield.
If a card would be put into an opponent's graveyard from anywhere, exile it instead.

Stabwhisker the Odious

At the beginning of each opponent's upkeep, that player loses 1 life for each card fewer than three in their hand.

Nezumi Shortfang

{1}{B}, {T}: Target opponent discards a card. Then if that player has no cards in hand, flip this creature.

Nezumi Shortfang // Stabwhisker the Odious

Howling Mine

At the beginning of each player's draw step, if this artifact is untapped, that player draws an additional card.

Gloomlake Verge

{T}: Add {U}.
{T}: Add {B}. Activate only if you control an Island or a Swamp.

Tourach, Dread Cantor

Kicker {B}{B} (You may pay an additional {B}{B} as you cast this spell.)
Protection from white
Whenever an opponent discards a card, put a +1/+1 counter on Tourach.
When Tourach enters, if it was kicked, target opponent discards two cards at random.

Mind Twist

Target player discards X cards at random.

Queza, Augur of Agonies

Whenever you draw a card, target opponent loses 1 life and you gain 1 life.

Dark Deal

Each player discards all the cards in their hand, then draws that many cards minus one.

Island

Hymn to Tourach

Target player discards two cards at random.

Liliana's Caress

Whenever an opponent discards a card, that player loses 2 life.

Murder

Underworld Dreams

Whenever an opponent draws a card, this enchantment deals 1 damage to that player.

Pilfer

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

Painful Quandary

Whenever an opponent casts a spell, that player loses 5 life unless they discard a card.

Seeker's Folly

Choose one —
• Target opponent discards two cards.
• Creatures your opponents control get -1/-1 until end of turn.

Swamp

Rush of Dread

Spree (Choose one or more additional costs.)
+ {1} — Target opponent sacrifices half the creatures they control of their choice, rounded up.
+ {2} — Target opponent discards half the cards in their hand, rounded up.
+ {2} — Target opponent loses half their life, rounded up.