In some Hindu traditions, such as Vaishnavism, Kalki is considered to be an avatar of Vishnu. Avatar means incarnation and refers to a descent of the divine into the material realm of human existence. The Garuda Purana lists ten avatars, with Kalki being the tenth. He is described as the avatar who appears at the end of the Kali Yuga. He ends the darkest, degenerating and chaotic stage of the Kali Yuga (period) to remove adharma and ushers in the Satya Yuga, while riding a white horse with a fiery sword. He restarts a new cycle of time. He is described as a warrior in the Puranas.