The Agate Hermit, Cordelia of Peritinassia

A reclusive sage, Cordelia of Peritinassia's life is largely a mystery, though hushed whispers among common folk suggests she was once the pupil of Mindlord X'xylub.

This is, of course, impossible, as it is unclear if X'xylub ever existed, and if he did, he vanished into the Gnawing Ice millennia ago.