 Two ravens or crows, flying over the warrior's head in battle, symbolised in Yakut mythology the Ilbis Kyyha and Ohol Uola, two evil spirits of war and violence.Some other gods or spirits in yakut shamanism, including Uluu Suorun Toyon and Uluutuar Uluu Toyon, are described as "great raven of cloudy sky".Ravens are common charges in world heraldry.