This spell may be cast on either the caster or any individual or single group within 24 yards. The spell makes the recipient(s) completely invulnerable to any kind of normal missile fire, including arrows, crossbow bolts, thrown weapons, or large siege weapons. The spell will not offer protection from magic missiles such as enchanted arrows, Fire Balls, etc.
This spell will last for a total of 2D6 combat rounds from the moment it is cast. The GM should make this roll in secret.