Meltdown

Destroy each artifact with mana value X or less.

Sadistic Hypnotist

Sacrifice a creature: Target player discards two cards. Activate only as a sorcery.

Oppression

Whenever a player casts a spell, that player discards a card.

Shrieking Affliction

At the beginning of each opponent's upkeep, if that player has one or fewer cards in hand, they lose 3 life.

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.

Wheel of Fortune

Each player discards their hand, then draws seven cards.

Lightning Skelemental

Trample, haste
Whenever this creature deals combat damage to a player, that player discards two cards.
At the beginning of the end step, sacrifice this creature.

Change of Fortune

Discard your hand, then draw a card for each card you've discarded this turn.

Bottomless Pit

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

Chain of Smog

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

Painful Quandary

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