The Seventh Doctor [Doctor Who]

Set: Doctor Who Type: Legendary Creature — Time Lord Doctor Rarity: Rare Cost: {3}{W}{U} choose a card in your hand. Defending player guesses whether that card's mana value is greater than the number of artifacts you control. If they guessed wrong, you may cast it without paying its mana cost. If you don't cast a spell this way, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")