Deduce [Murders at Karlov Manor]

Set: Murders at Karlov Manor Type: Instant Rarity: Common Cost: {1}{U} Draw a card. Investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.") Proft lit up like a man who had just been handed a glorious and unexpected gift. "I know who's responsible for this," he said. "And I can prove it."