Thread:GokūBlack10/@comment-4969779-20120713044042/@comment-28861328-20120713044710

Well, Shukai was inspired by Super Saiyan 4. It was used on Naruto Fanon first and then migrated here when I got into Bleach. It was originally Sei's technique and idea. He scrapped it when he thought it had become too powerful. When I was forming this arc several months ago, I realized that an enemy such as Akujin was going to require much more than just Bankai to defeat him, so I asked Sei to recreate Shukai and gave it a new background and a bit of a revamp to turn it into what it is now. I figured since, by definition, only Raian could use it and this is Raian's last arc, it wouldn't be misused and I could use it to finish the arc.