All traits not included...are Special traits. These can include, but are not limited to, Acid, Blessing, Curse, Light, Magic, Malediction, and Shadow. These traits are not included in any general trait, so abilities must specifically include them. Special attacks allow no additional role playing; you will suffer the effect of a Special attack immediately.
Even though the traits may be thematically similar to mental, physical, metabolic, or elemental traits, they are considered to be outside those classifications for the purposes of determining defenses.