Death (mythology)

Death is an Eternal and was one of the gods of Gallifrey. As such she represented and embodied Death itself.

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Death is not the oldest of the Gods, that was Pain. (NA: Set Piece)

Early in life, during the youth of his first incarnation, the Doctor had committed murder. He made a deal with Death, so that rather than having Death make him her Champion, Death would, instead, make another Time Lord, later known as the Master, her Champion. (BFA: Master)

The Doctor met Death for the first time on the Moon, when she was summoned by the Timewyrm as a robed skeleton. (NA: Timewyrm: Revelation)

The Doctor knows the rituals involved in journeying to speak with Death, Sabbath had also witnessed Death's abode. (EDA: Camera Obscura)