More info
Colourless
Uncommon
Casting Cost - 5,
Non-Foil
Artifact
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.
Illus. Glen Angus