User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-10750309-20130902134255/@comment-10901795-20130902180220

RR got the fire wood idea from a person in a story called 'the caledonion boar hunt' where the hero invites all the greatest heroes and argonauts to a boar hunt where some of them die. This person who invited them all is atached to the firewood just like Frank. In other versions of the story it is nit a piece of firewood but a piece of string. In both of the versions, it is given to this person's mother by the fates. There for, the piece of firewood is merly another form of Frank's life thred like Luke's one that we saw the fates cut in TLT. Granted, this is contrary to what Frank was told that he had this one great weekness because all his other powers were so epic, but hay, RR makes mistakes. But the piont is that for him to die, the fire wood needs to be destroyed, for the fire wood is his life and so, though he may suffer injery, it is it's destruction that will kill him, so it is not a question of will the wood die if he dies, it is that the wood MUST die for him to die. So yes he is invinsable unless the wood dies.