Board Thread:General Discussion/@comment-4976518-20140808063123/@comment-10330822-20191026064700

I'm also of the opinion that complete hypnosis is the Shikai and Bankai as well, but the Bankai is just a higher intensity. Is it possible the hypnosis is conditionary on reiatsu levels though? Aizen is so power that perhaps his Shikai is enough to catch anyone in it, but the Bankai was supposed to enhance the effects to capture stronger individuals that the Shikai couldn't capture. And so as Aizen got stronger, the necessity of his Bankai decreased and ended up just being a waste of reiatsu as no one could resist his Shikai. So it could be a similar problem what Yamamoto had where the Bankai is usually just not needed because the Shikai is just so powerful.

Aizen once told that Sui-Feng that effects of Zanpakuto that are usually reiatsu are dependent of reiatsu vs. reiatsu, and stronger reiatsu will always beat out the effects of weaker reiatsu abilities, like Suzumebachi.

So perhaps the concept is the same here? But Aizen is the opposite, and his overwhelming reiatsu eliminated the need for a Bankai because it made his Shikai to overwhelmingly powerful and the Bankai not cost effective. After all, why waste excessive reiatsu hypnotizing people who can be hypnotized his with Shikai.

It makes me wonder if perhaps, back in the day, Kyoka Suigetsu wasn't so broken because Aizen's reiatsu wasn't always so overpowering, and perhaps certain Captains could have seen through the illusion if their reiatsu was higher.