Tarnhelm


Tarnhelm is a magic helmet in Richard Wagner's Der Ring des Nibelungen. It was crafted by Mime at the demand of his brother Alberich. It is used as a cloak of invisibility by Alberich in Das Rheingold. It also allows one to change one's form:
Finally, it allows one to travel long distances instantly, as Siegfried does in Götterdämmerung, Act II.

In popular culture