Board Thread:Off Topic/@comment-37411075-20191014172540/@comment-37411075-20191016020632

Lore Time:

The Devils (and there weaker siblings, Demons) were created to be tools to destroy life. Despite being extremely powerful, they had one major flaw: They lacked physical forms and required vessels to manifest physically. This resulted in the God Of Darkness locking them away and creating the Grimm instead. However, before departing from Remnant following Salem's rebellion, He unleashed the Devils and Demons upon the planet, meaning that they are free to cause destruction with very little to stand in their path.