I'm thinking the Rod is to control either the Jyuubi, or Obito. If Edo-Madara had such control over Harashirma, then he would've spent time punishing him instead of fighting each other to a draw. He may be able to tap into Senjutsu, or use it, but I don't understand how logically he could control Kabuto's Edo's that he can't even control #1, and how Madara even survived the Edo shutdown in the first place... Its not like he created the jutsu, or even controlled Kabuto's mind in the first place to get the knowledge to 'hang on'. Unless the Rinnengan just overrode the control, but that doesn't explain why Nagato didn't have the same opportunity. Plot holes everywhere in this bitch.
Just a Badass Crew...
"Why, Mr. Kyf? Why do you do it? Why get up? Why keep fighting? Do you believe you're fighting FOR something? For more than your Characters survival? Can you tell me what IT is? Do you even know? Is IT freedom? Or truth? Perhaps peace? Yes? No? Could it be for love? Illusions, Mr. Kyf. Vagaries of perception. The temporary constructs of a feeble human intellect trying desperately to justify a shinobi that is without meaning or purpose. And all of them as artificial as the Matrix itself, although only a human mind could invent something as insipid as love. You must be able to see it, Mr. Kyf. You must know it by now. You can't win. It's pointless to keep fighting. Why, Mr. Kyf? Why? Why do you persist?"
I speak 4 languages...
English, Profanity, Sarcasm, and Real Shit.