Nefrin

Nefrin was the planet where, long before the formation of the Earth, Brimo was sentenced to imprisonment inside the Eternity Capsule for the rest of her long life for conspiring to "pervert the course of destiny". Empires waxed and waned following Brimo's imprisonment, the wind of planet's mountains were eventually ground down into sand, and the planet itself eventually ceased to exist. (COMIC: Doctor Who and the Time Witch)