Ty Kora Tek is the Goddess of the Underworld. She is sister to Asrelia, but is neither so beautiful nor so kindly. Within a vast grey cavern she rules the dead and is worshipped by those who prepare the dead for burial and those who prepare the sick and dying for death.

Candiates of initiate membership in the cult of Ty Kora Tek must be women past the age of child-bearing. Priestesses of Ty Kora Tek are said to have the ability to summon the dead back from the grave.

Ty Kora Tek is portrayed as a gaunt old woman, wrapped close with a shroud. She is often given a skull's face.