It is believed that Vishnu incarnates in each Yuga (a cycle of time) to preserve the universe and restore dharma. The Matsya, Kurma, Varaha, and Narasimha avatars in Satya Yuga; Vamana ...

Kalki is a significant figure in Hindu eschatology, foretold to end the current era of Kali Yuga and usher in Satya Yuga ... Purana as the tenth avatar of Lord Vishnu, destined to end the era ...