There's no such thing as light or dark psynergy, so I have no problem with that.
...Yes, there's no such thing as dark psynergy. Even counting Dark Dawn. Name a dark spell from there. Go on, I'm waiting. They had a lot of talk about it, but never once was it showcased - I think they were lying. After all, those so called Dark Adepts never cast a single spell. They fought like inepts! Like Briggs, Moapa, and the Kaocho Generals! I dare say they weren't adepts at all! That dark shield doesn't work, as it costs 0 PP to cast, and can easily be considered an equipment effect, too.