Bleach 231

[Yukimura]

What I want to know is why those three soul slayers spirits were used to trap the general captain away. Don't get me wrong the captains who have them are really strong, but I'm curious as to why they weer sent by Muramasa instead of some other ones. And he said reiatsu was used to trap him. So clearly they have a really strong reiatsu or something, I'm just curious why them though?

I would wager that it has a lot to do with the fact that those three zanpakutou have been shown the least in the series. We have no idea what Kyouraku or Ukitake's zanpakuto can do and all we've seen from Unohana's is the healing monster thing. Filler can't really expand on stuff that hasn't been revealed. That being said, those three are also (seemingly) the oldest captains other than Yamamoto. If we assume that Shinigami (and thus zanpakuto) get more and more powerful with time then those three are probably the most powerful zanpakuto around. For sealing someone as badass as the Captain-Commander I think it makes sense that Muramasa would have to use the best to pull it off.

[The Chancellor]

warned for spoilers

I would wager that it has a lot to do with the fact that those three zanpakutou have been shown the least in the series. We have no idea what Kyouraku or Ukitake's zanpakuto can do and all we've seen from Unohana's is the healing monster thing. Filler can't really expand on stuff that hasn't been revealed. That being said, those three are also (seemingly) the oldest captains other than Yamamoto. If we assume that Shinigami (and thus zanpakuto) get more and more powerful with time then those three are probably the most powerful zanpakuto around. For sealing someone as badass as the Captain-Commander I think it makes sense that Muramasa would have to use the best to pull it off.

If you're saying that it'd be a good to show what those spirits can do, then I agree with you. If you're saying it's a bad idea, then I disagree.

I want to see what all of them can do, but mostly just Kyorakus. We just saw someone posting manga spoilers in the anime section... (-admin). So seeing their swords spirits at work would be something special. Especially in their raw pure power form.