Hades Helmet

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Hades Helmet refers to the Gift that grants the wearer Invisibility. It is one of the two mass copied Gifts that Perseus made for its members. With the original loaned to the right hand man of Laius to take down the No Names in the Game. Copies do not have the crest as seen in the picture and can only turn the person invisible. Whereas, only the original is able to hide scent, sound and turn the person invisible.

Debut in:
anime episode 4? and volume 1 of light novel.