I enjoyed this very much. I practice shamanism so the concept hits close to home. What is the experience that you are writing from? Imagined or based on an encounter?
Here are some thoughts that may help take it further.
The gaze is powerful but so are the tools. What would your shaman use? Feathers? Stones? Chants? Is there a ceremony for all this? Does he or do you transform into another form? In that form do you adventure somewhere? Can you see his helpers forming a circle around your encounter? How old is he? Is he more than one age at the same time? Most shamans perform dismemberment. In that vision you are destroyed and then made into a new form. Can this shaman take you there?