and courtesy till the end of  Kaliyuga . Ashwat thama seeks the knowledge of  Brahmastra  from his father Dronacharya. MahaBali     Bali , a n  asura , was the  son of Devamba and  Virochana    chakravarti mentioned in Sri Vishnu puraanam, Sri bhaagavata mahaa puraanam etc in vaamanaavathaara vruttaantham. Mahabali  (