Rather than let this thread fall to the back pages, I am going to attempt to give you some help and hope that someone with some definite info will come along to help...
As your vitality attribute is raised, the Gnome will get a percentage of resistance to Mental Spells. I would imagine with a high enough vitality, the Gnome would become immune, which could come in very handy since some of the monsters in this game cast some very mean Mental spells!
P.S. A Gnome will probably be immune by the time you encounter any opponent with worthy Mental spell skills.
[ 01-10-2002: Message edited by: Moni ]