>>512708273
What you're talking about sounds more like emotional control, and I've never been good with that. What I'm talking about is emotional suppression.
Idk how to manifest "kore sadistic overall" out of nothing, but if you already have it within you, then supressing stuff that stifling it like guilt is where the techniques listed above could come in handy.
And of course, all of the abovementioned is purely imaginative.