Okay, so...what sort of holy magic are we talking about here? Chrono has a few vials of holy water that he brought with him from his home, would that work? And Chrono also has an armory-in-a-box that contains weapons meant for fighting demons from his world--bullets with holy water inside of them instead of explosive charges, bullets with some sort of holy spell inscribed on them, barriers that can trap demons and ghosts and that sort of thing in them, etc...would those work against the undead?

...Also, let's say that, I don't know, a demon who normally is hurt by holy water gets infected with this disease. If the magic required is used on him, would that be...similar enough to holy water to uh...actually kill him? Or is it different than that?

I'm considering all of my options for this plot and I haven't played WOW so uh, yeah.