I have a character which serves Bazim-Gorag, a Primordial from the Elemental Chaos. Since the Primordials and the Elemental power source are in direct opposition to the Divine power source of the Gods of the Astral Sea, I don't think he can technically be called a 'Cleric' (game mechanics aside). He would be a cultist, correct? And his power source should in theory be elemental, and not divine, right?
Of course I won't mess around with game mechanics, just want to make it consistant with the setting.