In the Ullanat family once upon a time, there was a Karanavar who was a great Upasaka and Maantrika. It is said that he had the Darshan of Goddess Parvathi in the form of a woman of Kurava tribe on the hills of Kalladikode. (It is the form that Goddess Parvathi took to accompany Lord Shiva when he took the form of Kiraata. The Goddess is known as “Tvarita” in the Tantric lore.) The Goddess Kurathi Bhagavathi accepted to come with the Ullanat Karanavar and to be the Upasana Devata at his home at Athit Bhavanam. There is also another version that She was brought by the Karanavar from Ezham, i.e., Srilanka. There is yet another version that the Ullanat Panicker and his friend, the Naduvazhi Nair of Puravur family went to Kalladikode for learning the secrets of the esoteric art of Mantravada. After spending some days and learning the art they started returning. At the foothills of the mountain Goddess Parvathi as Kurathi offered to come with Ullanat Panicker. All the Mantric texts in palm leaves were handed over to the Puravur Nair and Ullanat Panicker offered the top of his palm-leaf umbrella for the Goddess to ascend. And thus she was brought to Venkitangu by Ullanat Panicker. (This Puravur Nair, who later became a great Mantrika, is worshiped as Ammavan, a clan deity, in Puravur family also). The Karanavar worshipped the Goddess with ardent devotion and attained salvation. And the descendants started worshipping both this Karanavar (Ammavan) and Kurathi Bhagavathi as the deities of the clan.