Altered Nova said:
Wow. Now all I can wonder is why the hell didn't Kishimoto use this idea? Obito would have been a way better solution than a convoluted sequence of "Orochimaru gives Sasuke chakra, he reactivates his Sharingan, he summons a snake, hypnotises it, climbs inside it's mouth, and then unsummons, all seemingly in the span of a couple seconds at most."
Try not to think of it as A, B, C, D and more like A(X+Y+Z)B. Really, the only thing Sasuke needed was to get Manda down there to shield him from the blast. Of course, Manda isn't going to just sit around and eat a NGE explosion, so he had to work fast. Since Orochimaru was customizing Sasuke's body for his own use when he bodyjacked him, Sasuke likely recovered chakra at a faster rate, particularly with the Sharingan off. Depending on that recovery rate, Sasuke may not had to borrow any chakra to do anything (and even if he did, in wouldn't be directly from Orochimaru himself, since that part means bad bad news -- he would likely take some from the buffer sealing away Oro). And the chakra gathering could have been done the moment Deidara started to go nuclear.
So, that leaves summoning Manda, hypnotizing him into opening his mouth enough for him to Body Flicker into it (you didn't think he physically
crawled into the mouth of a giant snake, did you? Think like a ninja!) and ride out the storm. Because, really, Sasuke doesn't have to unsummon anything, and based on the scroll he left with Suigetsu, I highly doubt he has the ability (seems like only a summon can unsummon itself), and Manda would be too fucked up to do it, either. Meanwhile Karin wouldn't be able to sense Sasuke's chakra because a) he's running on fumes for real now, and b) he's inside the mouth of a giant snake, which means she probably wouldn't be able to sense a faint him over a giant noise like Manda, no matter how good she is.
That reduces a lot of time he didn't have. Even more if he can cheat-summon Manda like Orochimaru and the tattoo on his arm. That just leaves Sharingan-nosis, which, for anything else, I would say that's going to be a hard sell. Except for one (dis)advantage Manda, and pretty much all his brethren has compared to any other animal summons we've seen. You know what that is?
....
...if you said lack of eyelids, you would be correct.
Snakes don't have eyelids, so Sasuke could, and likely did, have Sharingan on already and hitting Manda right in the eyeballs where he would appear without him ever knowing what happened and with a 100% success rate. No fucking around, no listening to his bullshit about demanding sacrifices, or what have you. Just a simple zip-WHAMMY-zipzip, and it's done. Best of all, Sasuke doesn't have to say anything -- he controls Manda and just have to think what he wants. And the easiest thing to manipulate would be functions someone would normally use anyway like flicking the tongue. After all. he just needs a small opening to Flicker through, and given the explosion right upon them, it's all he could afford. After he's safe inside, just ride the hit because Sasuke don't give a fuck about snakes, anyway. It's then Suigetsu's job to summon the snake from wherever the beast was flung due to the explosion.
So, yeah, it's actually a lot simpler when you consider the goal is just as simple. I think readers tend to complicate things and don't stop to think outside the box because not everything is going to be spood fed to us -- we still have no idea just where did Sasuke get the Hawk summon, and Masashi further declined to tell us by having Tobi lampshade its usage for us.