User blog comment:Hitsuji Mamoru/Date Masamune/@comment-38196594-20190720234545/@comment-4802891-20190721055651

What I had planned was a clean 90% (10% + 80%) at level 10, forcing you to max him out if you want a quasi-surefire at using that skill, because the demerits are quite severe.

You know what? It's no very fair that way, because it means this is way too risky to use this skill if you don't have both a attack and defense debuff on him. I'll raise the base chance too.