The Grand Arcanum is Awake

M rated! after Father's defeat, the Scarred man found himself hunted by the Alchemists, with no other choice he gives his beloved son to an old friend of his that had been hiding in the Elemental Countries, forced to give to the young boy his own arms he doesn't suspect that in an act of desperation Minato will seal Kyuubi in the same boy, introducing Alchemy to the shinobi world