The infamous monster known to have multiple heads in mythology is the Hydra. In Greek mythology, the Hydra was a serpentine creature that possessed numerous heads; every time one was cut off, two more would grow in its place. It is often associated with the hero Heracles, who was tasked with slaying the beast as one of his Labors. The Hydra symbolizes the challenge of overcoming seemingly insurmountable obstacles and the idea of regeneration.