I would use it to invisibly pass by the palace guards.
To slay Medusa.
Cerberus, helmet of invisibility
The helmet of invisibility belonging to Hades in Greek mythology is called the Cap of Invisibility. This magical helmet allows the wearer to become invisible when worn. It is one of the three legendary items known as the Helm, Cap, or Helmet of Darkness.
His Helmet of Invisibility.
Hades had an invisibility cap, or helmet.
Hades, he was a helmet of invisibility.
It was feathered shoes, Bright shield, Helmet of invisibility.
A helmet of invisibility - From Hades Winged sandals - From Hermes Wisdom - From Athena
Hades owns the invisibility helmet called the Helm of Darkness or Helm of Hades, which grants him the power of invisibility when worn. It was crafted for him by the Cyclops during the Titanomachy war.
Zeus' lightning bolt, Poseidon's trident and Hades' invisibility helmet.
It depends on the God. --- Zeus had thunderbolts; Poseidon had his trident; Hades had a helmet of invisibility Aries used any weapon Eros used a bow and arrows.
The helmet of invisibility, metals, or jewels. Sometimes, mortals would sacrifice black sheep to Hades.