Hollowbone Knuckles

Wondrous item - rare - requires attunement
A set of hollow avian bones, sculpted into a ring of spikes around a palm bar. When gripped, the spikes extend out several inches from the wielder's hands, hollow cores wicking out poison from a reservoir which fits over the back of the hand.
When wearing this device, the wielder's unarmed strikes deal 1d4 piercing damage. When attuned, a creature can use a free action to draw poison from the reservoir into the knuckles, applying it to the weapon, which is then applied on their next successful unarmed strike. The reservoir can hold 3 doses of injury or contact poison.
It currently contains a single dose of Crawler Mucus (DC13 Con save or be posioned and paralzyed for 1 min, repeat save at end of turn)