King of hearts 
The hero of Onam, King Mahabali, was an Asura king - Asuras were the traditional enemies of the Gods - who ruled over Kerala. Bali was such a good ruler that soon the Devas - the Gods- began to fear that his fame and popularity would affect them adversely and that he would win in their age-old battle for supremacy. So they approached Lord Vishnu and appealed to him to destroy Bali. Vishnu agreed and came to Bali in his incarnation as a Brahmin boy called Vamana.