Kalki (Sanskrit: कल्कि), also called Kalkin, is the prophesied tenth and final incarnation of the Hindu god Vishnu. According to Vaishnava cosmology, Kalki is destined to appear at the end of the Kali Yuga, the last of the four ages in the cycle of existence (Krita). His arrival will mark the end of the Kali Yuga and herald the beginning of the Satya Yuga, the most virtuous age, before the ultimate dissolution of the universe (Mahapralaya).