Knowledge Pool [Mirrodin Besieged] GG06 "Limitless power is glorious until

"Limitless power is glorious until you gain limitless understanding

Set: Invasion Type: Instant Rarity: Uncommon Cost: {1}{U} Any number of target creatures become the color of your choice until end of turn

they must use the new result

Set: Team Rocket Unlimited Type: Grass Rarity: Holo Rare

It's quite harmless

Knowledge Pool [Mirrodin Besieged] GG06 "Limitless power is glorious untilSet: Mirrodin Besieged Type: Artifact Rarity: Rare Cost: {6} 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.