Kalki, also called Kalkin, is the prophesied tenth avatar of the Hindu God Vishnu. His birth will be the end of the Kali Yuga, the final of the four eras (Satya Yuga, Treta Yuga, Dvapara Yuga, and Kali Yuga), in the endless cycle of existence within Hinduism. This will subsequently start a new cycle with Satya Yuga.