A bull from Bulgarian mythology with skin as tough as bronze and causes thunder when it stomps. It killed peasants and their horses, and was slain when one of the peasants disguised themselves as a horse, and impaled it with a golden sword.
"A one-eyed bull that caused chaos around the Balkans. With a cry like thunder and speed like lightning, it would run through ranches, ramming and killing any cow or horse in its way. Its skin was made of bronze and could deflect arrows with ease. It was also very cautious, never getting close to a human when it spotted one, and could sense traps with its magic. It was finally killed by a man who made a golden sword."