Imprint — When Knowledge Pool enters the battlefield, 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 Knowledge Pool without paying its mana cost.
![Knowledge Pool [Mystery Booster]](http://abyssgamestore.ca/cdn/shop/files/bf4b3188-477d-5b8f-a278-9fde7a5fe39a.jpg?v=1750955835&width=1445)