Osogan (Osun staffs) are kept by the Osun priests, and they were usually fortified with medicine. Osun is the deity of medicine and ensures the effective use of all forms of medicines, curative or otherwise. Osun is worshipped by the professional traditional doctors called Ewaise, and their guild performs an annual festival called Ehosun in honour of the Osun deity. During the festival, medicines are believed to be strengthened, and the Osogan can stand without support, exhibiting mystic powers. Osun can also be worshipped domestically. Households with Osun shrines have special rooms where their medicine is kept, and annual rites are performed. Different priests have various ornaments on their Osogan which usually represent the powers they have attained – when a priest acquires or attains a certain power, he adds a representation of this power to his Osogan. This makes every Osogan different.