Thought Prison 
Artifact
Artist:
Glen AngusShare:
Text:
Imprint — When Thought Prison enters the battlefield, 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.
Rulings:
- 12/1/2004 The second ability triggers only once per spell. If the spell shares both a color and a converted mana cost with the imprinted card, Thought Prison deals 2 damage, not 4.
Legality:
- standard: Not legal
- future: Not legal
- frontier: Not legal
- modern: Legal
- legacy: Legal
- pauper: Not legal
- vintage: Legal
- penny: Legal
- commander: Legal
- 1v1: Legal
- duel: Legal
- brawl: Not legal
- oldschool: Not legal
- historic: Not legal
- pioneer: Not legal
- gladiator: Not legal
- premodern: Not legal
- historicbrawl: Not legal
- paupercommander: Not legal
- alchemy: Not legal
- explorer: Not legal
- predh: Legal
- oathbreaker: Legal
- timeless: Not legal
- standardbrawl: Not legal
Sets:
-
Mirrodin #261 (uncommon)
