In the past, there were two types of shamans, the good and the bad. The good were the healers, leaders, song makers, dance composers and were the ones to ask the spirits for the return of a good hunting season. The bad ones tried to steal the powers of other shamans and made peoples lives miserable by either making them ill or go crazy.
People wonder if there are still shamans still living today and the answer is yes. The problem is that there aren't as many shamans as there once was before the colonization period. They are still important to the Yup'ik culture, nonetheless.