The War Doctor is a rare Legendary Creature — Time Lord Doctor card from Doctor Who (WHO), collector number 548. Current market price: $1.89 (foil $1.79), TCGplayer market prices via Scryfall.
Whenever one or more other permanents phase out and whenever one or more other cards are put into exile from anywhere, put a time counter on The War Doctor. Whenever The War Doctor attacks, it deals damage equal to the number of time counters on it to any target. If a creature dealt damage this way would die this turn, exile it instead.