Swarmeater's Clasp
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.
Traits
A character can invest only 10 magical items that have the invested trait. None of the magical effects of the item apply if the character hasn't invested it, nor can it be activated, though the character still gains any normal benefits from wearing the physical item (like a hat keeping rain off their head).
Something with the magical trait is imbued with magical energies not tied to a specific tradition of magic. Some items or effects are closely tied to a particular tradition of magic. In these cases, the item has the arcane, divine, occult, or primal trait instead of the magical trait. Any of these traits indicate that the item is magical.