hierophant

noun3

1. •
   An ancient Greek priest who interpreted sacred mysteries, especially the priest of the Eleusinian Mysteries.

   • The exhibition of ancient statues, relics, and symbols, concealed from daily adoration (as in the Catholic festivals of this day), probably, made a main duty of the Hierophant. — 1837
2. •
   An interpreter of sacred mysteries or arcane knowledge.

   • What did even the hierophants of science know of the potencies of, for them, unvintageable evil? — 1947
3. •
   One who explains or makes a commentary.