From Pathfinder #214: The Broken Palace, which isn't enabled.

Essence Charm

ITEM 4

Price 100 gp

Usage worn

Bulk —

Anyone can use an essence forge to craft an essence charm without needing to know the formula for an essence charm. No larger than a coin, an essence charm is normally worn around the neck or hung from a belt—its exact appearance is up to the crafter. When an essence charm is created, its crafter selects a skill in which they are at least trained. The essence charm grants a +1 item bonus to that skill when worn.

Activate—Lucky Charm (concentrate)

Frequency once per day

Trigger You fail or critically fail a check using the essence charm's chosen skill

Effect A failed check becomes a success, and a critical failure becomes a failure.

Pathfinder #214: The Broken PalaceORC