Knowledge Pool MBS/111

Set: Mirrodin Besieged
Collector Code: MBS/111
Name: Knowledge Pool
Type: Artifact
Oracle text: 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.
Rarity: Rare