He is playing his flute behind the tree as the cow grazes. In His incarnation as Krishna, Lord Vishnu destroyed a number of demons employed to eliminate child Krishna. He killed Kansa, the notorious tyranny ruler, who was also Krishna's maternal uncle. Lord Vishnu, one of the Trinity Gods in Hinduism, is responsible for the preservation of the universe. In order to preserve the universe from any impending catastrophe, He took various incarnations. These incarnations detail the divine help extended by Lord Vishnu during various stages of human evolution, by appearing on earth in different forms. These incarnations are said to demonstrate that divinity re-establishes Dharma or righteousness and destroys injustice from time to time, by appearing on earth in various incarnations.