by KarasuG
There is no benefit to stunning a creature again while it is stunned. It is already stunned nothing worse can happen to it.
This is true except in situations where the heroes have a weapon/ability to kill monsters instead of stunning them, but a hero without that weapon/ability stunned them first. Heroes can still attack stunned monsters, and the hero takes no damage if the monster wins. If a stunned monster is attacked and defeated by a hero with the power to kill, it is still killed.