Flotsam // Jetsam
//
Instant // Sorcery
(CMC 8)
Mill three cards. Investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")
Each opponent mills three cards, then you may cast a spell from each opponent's graveyard without paying its mana cost. If a spell cast this way would be put into a graveyard, exile it instead.