For a normal person, their mind might collapse after experiencing the power of this divine ability. Even if their mind doesn't collapse, they will be terribly injured and might be so shaken that they will never harm someone again.
The pain and suffering alone is bad. But the worst part is that the damage from the divine ability will put them in the right state of mind for them to be vulnerable to the rank 6 Guillotine divine ability.
But for a killer that has killed a lot of people and inflicted a lot of pain, this divine ability might as well be a death sentence.
So when the divine ability was used on the avatar, its body and mind collapsed with a bang. The rank 6 Guillotine divine ability wasn't needed to kill it at all. But if it had survived the mental attack, the white mood blade above its head would have stained itself red with blood.