Gyumao/Origin

Origin
The Ox King is a major character in the chinese novel Journey to the West, where a major roadblock known as the Blazing Mountain blocked the protagonist's way, and only the Ox King's wife, Princess Iron-fan, had a magical Basho Leaf Fan that was capable of extinguishing the flames. Despite being a sworn brother of the Qítiān_Dàshèng from the past, the Ox King held a grudge against him for having subdued the Ox King's son in a previous encounter, and only gave up the fan after being defeated by Nezha who led the armies of Taoist Heaven as well as Vaisravana who led the four heavenly Kings of the Buddhist realms.