Arrows of Piercing +3 are magical arrows with a notional +3 enchantment, that have a bonus to THAC0 and deal additional Piercing damage.
Properties[]
These arrows have a +4 bonus to THAC0, and deal 1d6 Missile damage. They can hit creatures which require weapons to be of +1 enchantment (or greater) to be hit.
Additionally, these arrows force the victim to make Save vs. Death or take an extra 6 Piercing damage.