any animal or cosmic object can become a source of power or a guardian spirit… any spiritual, animal, or physical entity can become a source of power or guardian spirit, whether for the shaman or for an ordinary individual.
Eliade argues that the category of guardian spirit is ontologically open — no entity is excluded from assuming this function — and that this universality is central to understanding shamanic cosmology.
, Shamanism: Archaic Techniques of Ecstasy, 1951thesis