Shadowpiercer

Muted, silvery moonlight gleams along the curved blade of this +4 major striking ghost touch spear. Braided tassels of horsehair dangle from its sturdy haft, and archaic runes in Nidalese script shimmer along the weapon in the presence of shadow magic.

Shadowpiercer ignores immunity and resistance to precision damage of creatures with the incorporeal or shadow trait, and deals an additional 2d6 precision damage to such creatures. While wielding Shadowpiercer, you gain a +2 status bonus to saving throws against darkness and shadow effects; this bonus also applies to allies within 60 feet of you while you wield the spear. If you are a worshipper of Zon Kuthon, you are Darkness spell on it once a day for an entire month while it is unattended.