Mirrodin

Thought Prison

Imprint When Thought Prison comes into play, you may have target player reveal his or her hand. If you do, choose a nonland card from it and remove that card from the game. (The removed card is imprinted on this artifact.)
Whenever a player plays a spell that shares a color or converted mana cost with the imprinted card, Thought Prison deals 2 damage to that player.

Imprint — When Thought Prison enters, you may have target player reveal their hand. If you do, choose a nonland card from it and exile that card.
Whenever a player casts a spell that shares a color or mana value with the exiled card, Thought Prison deals 2 damage to that player.