Saint Markovia's Thighbone

Rare (requires attunement)
Saint Markovia's thighbone has the properties
of a mace of disruption. If it scores one or more
hits against a vampire or a vampire spawn in
the course of a single battle, the thighbone
crumbles into dust once the battle concludes.
While you hold this weapon, it sheds bright
light in a 20-foot radius and dim light for
an additional 20 feet.