(Cast vs. Armor, Cast vs Armor, Cast versus Armor, CastvsArmor, Castvs.Armor, CastversusArmor) abbv. Cast versus Armor. A number which represents how much interference a spirit warding based attack spell faces due to the type of armor the target is wearing. Heavier, thicker armors which offer better coverage of the target tend to produce a lower CvA, while light armors (or a lack of armor) will produce a high CvA. Whether or not the armor worn by the target is enchanted will also influence CvA (negatively if the armor is enchanted.)

See also: spirit warding, CS, TD.