Maybe sharpen tools? But you better have a back up file / make a copy layer , since it's very easy to screw up.
I know that people use matlab image processing toolbox to use it. But in photoshop, I am not too sure how to do it.
Re: 225 Predictions [Bleach]
hmm but if Sado ability is hollow-ish, then won't inoue and others ability is also hollow-ish ?
I hope Kubo will give some explanation in the next few chapters :)