Gargantuan

Believed to have only existed during the Age of Legends, a Gargantuan mostly closely resembled a colossal bull with folds of extra skin layered along its body. Most gargantuans stood over 15 m (50 feet, 5 stories tall) at the shoulder with wide multi-point antlers like an elk (which regrew every decade), and a short horn at the tip of its nose. A gargantuan is extremely volatile and kills anything that annoys it.