Name:Knowledge Pool
ManaCost:6
Types:Artifact
T:Mode$ ChangesZone | ValidCard$ Card.Self | Origin$ Any | Destination$ Battlefield | Execute$ TrigKnowledgeExile | TriggerDescription$ Imprint — When CARDNAME enters the battlefield, each player exiles the top three cards of his or her library.
SVar:TrigKnowledgeExile:AB$ Mill | Cost$ 0 | NumCards$ 3 | Defined$ Player | Destination$ Exile | Imprint$ True
T:Mode$ SpellCast | ValidCard$ Card.wasCastFromHand | Execute$ TrigKnowledgeExileSpell | TriggerZones$ Battlefield | TriggerDescription$ Whenever a player casts a spell from his or her hand, that player exiles it. If the player does, he or she may cast another nonland card exiled with CARDNAME without paying that card's mana cost.
SVar:TrigKnowledgeExileSpell:AB$ ChangeZone | Cost$ 0 | Defined$ TriggeredCard | Origin$ Stack | Destination$ Exile | Imprint$ True | Fizzle$ True | SubAbility$ DBKnowledgePlaySpell | RememberChanged$ True
SVar:DBKnowledgePlaySpell:DB$ Play | ValidZone$ Exile | Valid$ Card.IsImprinted+IsNotRemembered+nonLand | Controller$ TriggeredCardController | WithoutManaCost$ True | Optional$ True | ConditionDefined$ TriggeredCard | ConditionPresent$ Card.IsRemembered | ConditionCompare$ EQ1 | SubAbility$ DBKnowledgeCleanup
SVar:DBKnowledgeCleanup:DB$ Cleanup | ClearRemembered$ True
T:Mode$ ChangesZone | Origin$ Exile | Destination$ Any | Static$ True | ValidCard$ Card.IsImprinted | Execute$ DBForget
SVar:DBForget:DB$ Pump | Defined$ TriggeredCard | ForgetImprinted$ TriggeredCard
T:Mode$ ChangesZone | Origin$ Battlefield | Destination$ Any | Static$ True | ValidCard$ Card.Self | Execute$ DBCleanup
SVar:DBCleanup:DB$ Cleanup | ClearImprinted$ True
SVar:Picture:http://www.wizards.com/global/images/magic/general/knowledge_pool.jpg
Oracle:Imprint — When Knowledge Pool enters the battlefield, each player exiles the top three cards of his or her library.\nWhenever a player casts a spell from his or her hand, that player exiles it. If the player does, he or she may cast another nonland card exiled with Knowledge Pool without paying that card's mana cost.