Ravana have abilities now truly awe-inspiring, Ravana proceeded on a series of campaigns, conquering humans, celestials and other demons. Conquering the netherworld completely, he left his brother Ahiravana as king. He became supreme overlord of all asuras in the three worlds, making an alliance with the Nivatakavachas and Kalakeyas, two clans he was unable to subdue. Conquering several kingdoms of the human world, he performed the suitable sacrifices and was crowned Emperor.Kubera at one point chastised Ravana for his cruelty and greed, greatly angering him. Proceeding to the heavens, Ravana fought and defeated the devas, singling out his brother for particular humiliation. By force he gained command over the gods, celestials, and the serpent races. At the time of the Ramayana, set several hundred years later, Ravana is shown as dominating all human and divine races - so much so that he can command the Sun's rising and setting.