The secret to Madara’s body is directly linked to the tablet. It seems to have something to do with the Rinnegan; specifically how Madara obtained his. I know there will be people stating “Kabuto added Hashirama’s cells to him making special and he restored him to his prime,” but that’s only a halfheartedly truth.
The whole truth is understanding how Madara unlocked the Rinnegan. What was it that allowed him to awaken those eyes? Was through the integration of Hashirama’s cells that enabled him or did it eyes actually evolve into the Rinnegan?
If his eyes did naturally evolve into the Rinnegan, then why can Nagato use Sharingan abilities as well? What’s stopping him from using them? I think I am the only one on NB who thinks this, but why does Madara have to switch between the two? He should be able to use both the Sharingan and Rinnegan conjointly and not separately
Anyways does anyone have any insight as to what this secret pertains to?