Pratihareshwar Mahadev Ujjain: Nandi, Agni and the Curse
Pratihareshwar is the twentieth of Ujjain's 84 Mahadevs. In the Skanda Purana, Agni takes the form of a swan to slip past Nandi, the doorkeeper of Shiva, and Shiva curses Nandi to go to earth. On the advice of the Lokapalas, Nandi worships a linga in Mahakalavana in the guise of a Kapalika and is freed. Here is the story as the text tells it, what the name means, and the claims that do not match.