With the release of chapter 549, we have gained several insights into character personalities, abilities and fighting styles. For example, Nagato joking about his ability to fly, Itachi showing a jutsu derived from the Phoenix Flower Jutsu, Samehada's apparent ability to feel pain, and the fact that Killer Bee stores five of his Super Vibrating Lightning Style Swords within Samehada's maw. But most of all, we will soon find out what power it was that Itachi gave to Naruto while he was still alive. I have speculated it to be some type of counter to the Mangekyo Sharingan. And because it activated in response to Itachi activating his right Mangekyo, which as we all know precedes his use of Amaterasu, I believe my speculation to be correct. But then again, it might not be. What are your thoughts on this power?
On a side note, I apologise for any spoilers in my post.