Are we sure his regular sharingan was ever shown when he would phase?
Not that I believe there will be a non-bullshit answer, but have there been any scenes that showed Tobi's eye in detail while he was phasing in/out? I can't recall any but I also have a shitty memory.
Will be Senju DNA blahblahblahblah regardless.
Edit: Beaten.
His ms is what allows tobi to phase, we know that already. And kakashi is losing his sight, that's why he knew of the drawback to the technique when he fought the itachi clone that sasori made. The only thing we can infer from obito not going blind is that after activating ms, to gain ems all you need to do is switch with another sharingan eye, not a ms eye; and we already know he has a shitton of eyes in storage.
If not, then at the very least, you need another ms eye to gain ems, but using regular eyes just gives you another sharingan to go blind in. This is needlessly complicated, since my first explanation also explains what's going on, but I guess this explanation works. I guess.
Oh I forgot, senjuu cells might make his eyes eternal. But that's the lamest reasoning yet.
Kakashi asked Itachi how his eyesight was after he started using his MS. So yeah his eyesight has started to diminish as well.
That's what I'm wondering. Waaaaay too lazy to check, but I dunno if we've ever seen a close-up of his sharingan while phasing. What we do know is that he's super-quick at turning it on, however, if he's actually flipping the MS switch ever time he activates Kamui, which is a lot. >_>
I'm inclined to believe that's regular sharingan for him, since after being crushed, he unconsciously phased into madara's cave, and we all saw his MS get activated when Rin died.
Evoked a similar head scratcher:
Story goes from Madara being the greatest Uchiha fighter to Orochimaru tier science whiz kid who took a scalpel to Hashirama? Wut.
As for the "Why isn't Obito blind?" I was under the impression that using Amaterasu / Tsukiyomi / Susanoo all came with the side effect of damaging your MS. Obito hasn't used either of the 3, Madara has EMS which gives him immunity to the drawback and we've seen both Itachi / Sauce go near-blind / blind after utilizing these techniques. Kamui seems to be a technique unique to Tobi so either it's some Senju DNA bullshit or only those specific 3 techniques bring about eye damage.
Actually, kakashi going blind but obito not would lead us to believe senjuu dna is keeping his eye from going blind.
Hashirama strikes again.
I may have jumped to conclusions based on this image:
Spoiler: show
During the fight against Naruto and Co., he's phasing all over the place. But the action shots of course didn't show his Sharingan eye at all. And then to top it off, the next chapter, he teleports away via what one would presume to be his Kamui technique, but again it only shows a regular sharingan before and then when he actually uses the technique, you can't see his eye
Yeah, just went back and reread a few times where Obito uses Kamui and it seems like Kishi has purposely made it hidden so as to keep the mangekyo shape a mystery until he was revealed.
All this Sharingan shenanigans do help explain why Oro was so fixated on getting Sasuke's body. I mean if Danzo's any indicator, the guy could've had a treasure trove of eyes.
But as was indicated a few chapters back, I think, he seemed to have a knowledge of what would happen if you spliced Senju genes with an Uchiha. Maybe he was trying to awaken the Rinnegan himself.
That's believable. I wouldn't doubt at all if the Orochi super scroll that would make Sasuke uber strong had something to do with Senju cells or DNA or blah blah.
Would be a good way to segway into why Oro never implanted sharingan's into himself when he obviously had the means to do it.
Obito can phase without MS. That's how he survived being crushed by the boulder (Madara said it's like he "phased through it" to avoid getting crushed), which was before he activated MS. Also; just a few chapters ago he activated his MS and said somehting along the lines of "Witness the REAL power of Kamui", which makes it sound like shifting is just a standard thing for his eyes, and Kamui gets super-powered in MS mode.
Yeah I was under that impression before, Madara pretty much confirmed it. As for Oro, it seems like the likeliest explanation is indeed that he was shooting to become the next sage (kabuto seems to know all about it from his work) and needed an uchiha body with some senjuice in it. Perhaps he didn't really care about the normal sharingan after all, no one seemed able to really kill him without it anyway.
What? No. He mentions "the real power of Kamui" because Kakashi doesn't have real control over the technique like Obito does. He accidentally phased into Madara's den because he did just that, activated it by accident when he was dying. He saw rin die and that's when he gained control over it. You're being obtuse to think Kishi would show Obito's mangakyo shape before the big reveal on his identity, any reader seeing the eye before the reveal would reveal who Tobi was, since we've already seen Kakashi's shape, and we know where he got the eye from. That's why Kishi never shows the eye during a phase. He also never has it "activated" all the time because it's only activated when using it; Sasuke's stays activated when using Susanoo/Amatsu/Tsuki, but goes away when he isnt. Likewise, Obitos would only show when he's phasing, but otherwise wouldn't hold shape when he's just chillin in the real world.
Also, Oro probably had an idea of what would happen if you mixed Senjuu and Uchiha DNA, but he never had any eyes, that's why he wanted Sasuke. Only Obito has "spare" eyes laying around, Danzo and crew only had Shisuis one eye. We also know you need more then just Senjuu DNA and a Sharingan to get rinnegan, since Danzo didn't have it. Probably need a real Uchiha body, which explains the fascination with Itachi and Sasuke.
I agreed with almost everything you said except that Danzo only had one eye. Dude had an arm full of sharingan. Danzo (and they also mentioned a connection to orochi) scavenged the fuck out of some sharingans after Itachi slaughtered them all.