A very valorous दानव . Once भरत son of आर्ष्टिषेण was making preparations for an अश्वमेध on the banks of the river सरस्वती with उपमन्यु as his priest when मिथु came and took them both to पाताल . Then देवापि , son of उपमन्यु , got his father and the King released from there by continuous worship of शिव (Brahma Purāṇa--127. 56-57) .