In Hinduism, Shakti was a rishi (sage) and son of Vashistha and Arundhati.
The Rishi cursed the king thus: "O worst of the worst kings, since thou persecutest an ascetic, like a Rakshasa, thou shalt from this day, became a Rakshasa subsisting on human flesh!
thou shalt wander over the earth, affecting human form!".
[2][3] He was the grandfather of Vyasa, author of the Indian epic Mahabharata.
After that, Kalmasapada ate successively all the 100 sons of Maharshi Vasistha.