Befallen are magic resistant. I was 16 wizy and couldn't get a spell off, we had a enchanter and he cast tashan but I dunno if it worked or not and we still couldn't cast on it. Thank goodness we had tanks and pets.
Lareit the Evil
Ralloszek.
Wisps require magic weapons to be hit. Wisps are non-aggressive, however they are extremely sociable.
The three variants of lightstones that they carry are excellent lightsources for humans and the other blind races.