Thought Prison MRD/261

Set: Mirrodin
Collector Code: MRD/261
Name: Thought Prison
Type: Artifact
Oracle text: Imprint — When this artifact 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, this artifact deals 2 damage to that player.
Rarity: Uncommon