The Seventh Doctor

Legendary Creature — Time Lord Doctor{3}{W}{U}3/6

Whenever The Seventh Doctor attacks, 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 token: Draw a card.")

Colour identity Azorius · Investigate · Commander page

In short

The Seventh Doctor has 7 listed printings; the most valuable is the Showcase · Surge Foil printing from WHO at US$7.66 on TCGplayer's market price. Prices below are the cheapest in-stock listing in the United States.