poa constrictor
This is a person who either consciously or unconsciously constricts the spiritual development of others due to treating others and oneself as a mere pile of atoms (see poa). This is a double pun as both a play on the phrase "boa constrictor" and the more subtle pun that such a snake inhibits breathing of the victim. Breath is known in Greek as "pneuma" and is synonymous with "spirit".
She showed herself to be a poa constrictor when she never offered any positive assessment to the fledgling spiritual questions asked by her children.