
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 ", Sacrifice this token: Draw a card.")
The Seventh Doctor is a UW Doctor's Companion commander built around attacking to free-cast powerful spells via a guessing game. Each combat you pick a card in hand; if the defender guesses your mana value comparison wrong you cast it for free, and if not you investigate for card advantage. Manipulate your artifact count and curve to make the guess a coin flip you usually win, then pair with a companion partner to flood the board or go wide.
Tighten the curve so your free-cast hits are consistently impactful bombs rather than filler, and add artifact ramp like Sol Ring and Treasure makers to both fix mana and warp the guess. Add evasion and protection (Rogue's Passage, Swiftfoot Boots, Teferi's Protection) so the Doctor reliably connects, and choose a companion partner whose ability compounds your engine, such as one that draws or makes tokens.
The most-played cards for this commander, built from aggregated deck data (the Mythic Graph). Build public decks to seed it.
No combos found for this commander on Commander Spellbook.
Same color identity (UW), by popularity.