User blog comment:Tommy,Klaus&Kol2012+/Can this "red hunk of clay" kill the Leviathans?/@comment-174.56.223.166-20120507192206/@comment-4920092-20120507202355

One does not simply "donate" a bone.....they tend to be important. I think, of your guesses, John is the most likely since he's already dead (but wasn't he cremated? My memory fails me here). It could just be a dead, righteous mortal, whose bone the boys steal from the grave.