There is a Shinto priestess here who has the power to ward off spirits. I am not familiar with the other two. [ Humans and their numerous religions.

His eyes narrow at the implication that his spells would be ineffective.]

My sorcery works just fine.[Even if the ghosts are making it erratic, details.]

A permanent enchantment might not be possible, but I have never seen a sword that could not be bestowed with a temporary one. [ He would know, he's enchanted a whole lot of weapons, and his tone speaks to it.]