
Kakine Teitoku(Toaru) vs Yhwach(Bleach)
Yhwach casually stomps, whether stat- or hax-wise. Kakine has 0 feats of acausality, or resistance to soul hax. Yhwach could just strip him of his state/powers too...

And here we go.
1. Him being acausal or w/e means jack shit if Yhwach can't actually harm him to begin with.
2. He doesn't. Have. A soul.
3. Yhwach can't do that. Even if he could, good for him. He got one of potentially millions of Kakine clones with each and every particle of them being able to split off and form another one. Exponential growth, yo.