Mirrodin Besieged Knowledge Pool Artifact Imprint When this artifact enters, each player exiles the top three cards of their library.
Whenever a player casts a spell from their hand, that player exiles it. If the player does, they may cast a spell from among other cards exiled with this artifact without paying its mana cost. Illustrated by Mike Bierek All Magic: The Gathering (MTG) card images and symbols Wizards of the Coast
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