Powers: Incredibly acute psionic abilities. He had psionic abilities common to Time Lords, seen variously by Susan, the Master and the Doctor. However, his specific abilities—of burrowing deep into the mind of another—have most explicitly been seen as an ability of the Tenth Doctor on television. Still, the magnitude of his powers are described as being far greater than any other Gallifreyan during the time of Rassilon.
Bio: Gallifreyan casualty in the First Great Time War. He was using his powers to extract information from the mind of Fenris when the Order of the Black Sun suddenly arrived and killed him and 10 other Gallifreyans.