Plot Summary:

Watch Harlock Saga: The Ring of the Nibelung – The Rhein Gold  full episodes English dub online

Captain Herlock is drawn into a saga of intergalactic proportions when the son of a deceased comrade unwittingly forges the Ring of the Niebelung. Evil forces gather to wage war against the last remaining superpowers of the galaxy led by a demented outcast. Herlock must counter the amassed armadas that threaten the last gods and recover the ring before Paradise is lost.

Sources: Myanimelist, Wikipedia