Kali vs. Rakasha

One of the battles in Roger Zelazny's Lord of Light. Kali, Shiva, Yama and Agni are all hunting down Sam, who, at this point in the novel, has aligned himself with the Rakasha. The Rakasha are former inhabitants of the colonized world in which all these events take place, and have given up their physical forms long ago to become beings of energy. However, they end up longing for physical forms and have thus developed the capacity to posses individuals. Oh, and they love gambling, LOL.

"Taraka, Lord of the Rakasha, is a demon, an energy being. Like the rest of his kind he was bound by Sam in the early days, but he is set free by Sam as part of a bargain to marshal his fellow demons to oppose the Gods."

from Answers.com