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From Pathfinder Lost Omens Tian Xia Character Guide, which isn't enabled.

Glorious Gamtu

FEAT 5
GOBLINOCCULT
Activity 1 action
Prerequisites dokkaebi goblin heritage
Frequency once per day

You can access the mystical power that dokkaebi refer to as a hat. You conjure a magical Gamtu Hat, which is a magic item of light Bulk. The gamtu persists for 1 hour, and you can give the gamtu to another creature to wear.

Pathfinder Lost Omens Tian Xia Character GuideORC