Accessory worn by messengers playing make-believe.
It can be obtained in the upper area of Oedon Chapel.
After defeating the Blood-starved Beast, a door in Oedon Chapel will be unlocked, leading to an elevator that allows access to the Healing Church Workshop. Get on the elevator and face the opposite direction. There is a hidden path that leads to the upper mezzanine of the Cathedral Ward. To the left of the chest containing the Formless Oedon rune, the Urn Festival hat can be found.