Hades' Helm, also known as the Helm of Darkness, is a mythical artifact from ancient Greek mythology. It is said to grant its wearer the power of invisibility, allowing them to move unseen among mortals and gods alike. This helm was crafted by the Cyclopes and is often associated with Hades, the god of the underworld. In various myths, Hades used the helm during battles or to capture souls, enhancing his ability to rule the underworld. The helm symbolizes the themes of power and secrecy, reflecting the hidden aspects of life and death in Greek lore.