Although Demons are not beasts, the "Slaughter Decree" is actually effective against any living creature. Some powers consider this cultivation technique a forbidden technique because some evil cultivators slaughter ordinary mortals in villages and towns to practice it, truly a path of demonic corruption. However, Han Tianzun's view in the small bamboo slip suggests that the technique itself does not change the cultivator's nature, therefore it cannot be considered a demonic technique. How it is used ultimately depends on the cultivator themselves; he believes Lancelot can use it on the right enemies.
Priests of the Goddess of Ice can protect themselves quite well. As his appearance suggests, Mohoi is a true barbarian at heart, he can summon ice javelins out of thin air, then he would loudly call out Olul's name and hurl the javelins with twelvefold rage towards his enemies.