When Wraithform is cast, the wizard and all of his gear become insubstantial.
When this spell is cast, the wizard and all of his gear become insubstantial. The caster is subject only to magical or special attacks, including those by weapons of +1 or better enchantment, or by creatures otherwise able to affect those struck only by magical weapons. The wizard also gains 25% resistance to magic damage. While in wraithform, the caster cannot cast either arcane or divine spells.