Fidgit: I checked my DMG and nauseated is a "condition", included in the "condition summary" section and everything!!! I quite like it as an alternative to fear, which I guess would be the usual reaction to overwhelming evil.
Saepiroth: yeah, that's a good idea. And of course, there is a Will save (if I add a resistance, it ought to be a set DC, and if I don't, it should probably be something like 10 + evil creature's HD/evil artifact's caster level).