Mirrodin Besieged (mbs) | ||
| #111 ⸱ Rare ⸱ English | ||
 Variations— Parts— | Knowledge Pool
Imprint — When Knowledge Pool 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 Knowledge Pool without paying its mana cost.
LegalitiesLegal Duel Penny Predh Legacy Modern Vintage Commander Oathbreaker Not Legal Brawl Future Pauper Alchemy Pioneer Explorer Historic Standard Timeless Gladiator Oldschool Premodern Standardbrawl Paupercommander RulingsIf the original spell isn't exiled (perhaps because it's countered by another spell or ability before Knowledge Pool's second triggered ability resolves), the rest of the ability does nothing. The player doesn't get to cast an exiled card.
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