When an offensive spell is cast, the target has two separate chances to resist the attack. First, there is a check based purely on the level difference between the caster and the target. This is referred to as the spell miss chance, and is affected by any Spell Hit Rating equipment that the caster is wearing. Talents that reduce the enemies' chances to resist spells, such as Arcane Focus, are also taken into account by this check. This level based resistance cannot be reduced by any means, not even Spell Penetration.