Sadasiva is believed to bestow anugraha and vilaya, or grace and obscuration of pasha, which are the fourth and fifth of the Panchakritya, or the "five holy acts" of Shiva.
[2] It is believed that the cult of Sadasiva was widespread in the region of Bengal during the period of Sena dynasty who traced their origin in South India.
The first ever sculpture of Sadasiva as a lingam with five faces was found in Bhita, near Prayagraj, and dates to the 2nd century CE.
[2] His five faces, Ishana, Tatpurusha, Vamadeva, Aghora and Satyojata are known as Panchabrahmas (five creators), the emanations towards the four directions and upwards from the nishkala (formless) Parashiva.
the supreme being Parashivam manifests as pentads, rather than the trinity of other Hindu sects - Brahma, Vishnu and Shiva.