From Pathfinder Guns & Gears, which isn't enabled.

Goblin-Eye Orb

ITEM 5

CONSUMABLE MAGICAL TALISMAN

Price 24 gp

Usage affixed to weapon

Bulk —

Category talisman

Usage affixed to a weapon

Activate (concentrate)

Trigger You attempt a Strike with the affixed firearm or crossbow against an enemy that's concealed or hidden to you.

Requirements You're an expert with the affixed firearm or crossbow and an expert in Perception.

This colorful marble dangles from a leather thong wrapped around the affixed weapon. When you activate the band, for the triggering Strike, you don't need to attempt a flat check due to the enemy being concealed or hidden to you.

Pathfinder Guns & GearsORC