Kali is a demon from Hindu legend who is described as a being of great power and (in some sources) the origin of evil itself - he is the archenemy of Kalki, the tenth and final Avatar of Vishnu.

Kali is an apocalyptic demon and has connections with the final cycle of Hindu lore, during this cycle evil overthrows good and a large majority of Earth loses faith in the gods and becomes corrupt : the cycle is long and bloody but ultimately ends when Vishnu arrives to end the cycle.

It is then said that Kali himself is defeated and the evils of the final cycle are cleansed, however due to the belief in Hinduism that the universe is infinite the cycle will continue and eventually Kali will return, alongside the evil cycle.. but in every incarnation he is doomed to fail in his ultimate goal of disrupting the natural order.