Well
To be honest, if you use brute force on a person, it does feel pain.
But if a monster?
Well
Magic is just the source to deal with beings that don’t feel pain.
So yeah, if gods versus demons. I think the laws will decide the ending for a two fingers forked into a numb shape holy war. Yes, lord is merciful but a person who has been messaged by the lord who creates all life, he or she is not.