Meltdown

Destroy each artifact with mana value X or less.

Dangerous Wager

Wheel of Fortune

Each player discards their hand, then draws seven cards.

Painful Quandary

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

Bottomless Pit

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

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.

Change of Fortune

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

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.

Shrieking Affliction

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

Chain of Smog

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

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.