the candidate holds a sword in his hand and, thus armed, climbs the birch that is set inside the yurt, reaches its top, and, emerging through the smoke hole, shouts to invoke the aid of the gods.
Eliade identifies the birch set inside the yurt as the shamanic axis mundi, whose physical ascent enacts the candidate's ritual passage from earth to sky during Buryat initiation.
, Shamanism: Archaic Techniques of Ecstasy, 1951thesis