Helm of Hades

Wondrous item, artifact (requires attunement)

Forged by the Elder Cyclopes for Hades, this cap has had many mythic wearers. Hades wore it during the Titanomachy, Athena during the Trojan War, Perseus to escape the Gorgons, and Hermes during his battle with the giant Hippolytus. While wearing the helm, you are invisible to all nonhumanoid creatures.