Extortion

Look at target player's hand and choose up to two cards from it. That player discards those cards.

Windfall

Each player discards their hand, then draws cards equal to the greatest number of cards a player discarded this way.

Hypnotic Cloud

Kicker {4} (You may pay an additional {4} as you cast this spell.)
Target player discards a card. If this spell was kicked, that player discards three cards instead.

Recoil

Return target permanent to its owner's hand. Then that player discards a card.

Ill-Gotten Gains

Exile Ill-Gotten Gains. Each player discards their hand, then returns up to three cards from their graveyard to their hand.

Flay

Target player discards a card at random. Then that player discards another card at random unless they pay {1}.

Duress

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

Headhunter

Whenever Headhunter deals combat damage to a player, that player discards a card.
Morph {B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

Larceny

Whenever a creature you control deals combat damage to a player, that player discards a card.

Innocent Blood

Each player sacrifices a creature of their choice.

Unhinge

Target player discards a card.
Draw a card.

Persecute

Choose a color. Target player reveals their hand and discards all cards of that color.

Wheel and Deal

Any number of target opponents each discard their hands, then draw seven cards.
Draw a card.

Urza's Guilt

Each player draws two cards, then discards three cards, then loses 4 life.

Fugue

Coercion

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

Mind Burst

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

Cabal Conditioning

Any number of target players each discard a number of cards equal to the highest mana value among permanents you control.

Ostracize

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

Blackmail

Target player reveals three cards from their hand and you choose one of them. That player discards that card.

Doomsday Specter

Flying
When Doomsday Specter enters, return a blue or black creature you control to its owner's hand.
Whenever Doomsday Specter deals combat damage to a player, look at that player's hand and choose a card from it. The player discards that card.

Cephalid Broker

{T}: Target player draws two cards, then discards two cards.

Last Rites

Discard any number of cards. Target player reveals their hand, then you choose a nonland card from it for each card discarded this way. That player discards those cards.

Addle

Choose a color. Target player reveals their hand and you choose a card of that color from it. That player discards that card.

Laquatus's Creativity

Target player draws cards equal to the number of cards in their hand, then discards that many cards.

Words of Waste

{1}: The next time you would draw a card this turn, each opponent discards a card instead.

Dying Wail

Enchant creature
When enchanted creature dies, target player discards two cards.

Abyssal Specter

Flying
Whenever Abyssal Specter deals damage to a player, that player discards a card.