Thought Prison
{5}Artifact
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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.
Official rulings
- The second ability triggers only once per spell. If the spell shares both a color and a mana value with the imprinted card, Thought Prison deals 2 damage, not 4. (2004-12-01)
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Functionally similar cards by meaning — playable in Thought Prison’s colours.
