From Pathfinder Treasure Vault (Remastered), which isn't enabled.

Swarmeater's Clasp

ITEM 8

Price 460 gp

Usage worn

Bulk —

A swarmeater's clasp features carved reliefs of verminous, swarming creatures. When you wear the clasp, you gain resistance 10 to physical damage from swarm creatures.

Activate (concentrate, manipulate)

Frequency once per day

Requirements a swarm creature is within your reach

Effect You thrust your hand into the swarm, draw forth a squirming mass of vermin, and devour it. You recover 3d10+8 healing Hit Points and deal the same amount of bludgeoning damage to the swarm. The Hit Point recovery is a vitality healing effect.

Pathfinder Treasure Vault (Remastered)ORC