Misers' Cage

At the beginning of each opponent's upkeep, if that player has five or more cards in hand, this artifact deals 2 damage to that player.

Black Vise

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 the number of cards in their hand minus 4.

Thumbscrews

At the beginning of your upkeep, if you have five or more cards in hand, this artifact deals 1 damage to target opponent or planeswalker.

Iron Maiden

At the beginning of each opponent's upkeep, this artifact deals X damage to that player, where X is the number of cards in their hand minus 4.

Ebony Owl Netsuke

At the beginning of each opponent's upkeep, if that player has seven or more cards in hand, this artifact deals 4 damage to that player.

Viseling

At the beginning of each opponent's upkeep, this creature deals X damage to that player, where X is the number of cards in their hand minus 4.