An image of a horse with wings made from the feathers of a cuckoo bird - the spirit-assistant of the shaman in the performance of trade ceremonies. At the request of relatives or a particular hunter, the shaman sent his assistant - a horse, to the Upper World to Boa Enduri (the deity of the sky and the Universe) with a request to send luck in fishing. The ritual of offering a white deer or a horse to the deity of the sky was performed by shamans who were worshiped only in the Upper World.