Thought Prison

Thought Prison
Mirrodin - Uncommon
Artifact
Glen Angus
Imprint — When Thought Prison enters the battlefield, you may have target player reveal his or her 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 converted mana cost with the exiled card, Thought Prison deals 2 damage to that player.

Rulings

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