Resist Magic
When under the effect of an offensive spell, there is a chance for the spell to be totally or partially resisted. Being totally resisted, nothing happens to the victim of the spell. Being partially resisted, its effect is reduced (eg, damage, duration).
Besides this skill, resisting a spell also depends on the circle of the spell being cast (the higher the harder to resist) and the Magery of the caster
Notes : Resist Magic does not resist either the Necromancy spells or Barding songs.