I wonder the structure of the sentence in bold. Can I put it like: The shaman possesses the power. The power is to conjure different collective intensities of being. The being admit transcendence through the metaphor and experience of the ecstatic journey. By the way does 'conjure' mean implore somebody to do something here?
The shamanic spectacle is associated with revelation and rebirth. The ostensible purpose of the spectacle is to achieve social reintegration. The shaman stands out in the tribe as a figure who possesses the capacity for transgression. This is because the shaman possesses the power to conjure different collective intensities of being that, through the metaphor and experience of the ecstatic journey, admit transcendence. (Celebrity, Chris Rojek)