User blog comment:Darkcloud1111/The Rules of Death and The Son of Neptune/@comment-4093491-20110905123106

Wait, wasn't he chained once by Sisyphus, oh great!! history repeats itself!!. Anyways, if this would be the correct theory, then Frank WOULD be a son of Mars(which we are not sure of)!! I'll tell you why, when Thanatos was chained but he was later freed by Ares, so if he's chained again, only a child of Ares/Mars would break the chains and free him!.