Talk:Demon/@comment-35530747-20200114145104/@comment-28144855-20200114235019

I believe pain, pleasure, fatigue, fear and general lack of concentration/focus on a greater scale (fainting, sleeping...) would break such spells if the user isn't uber advanced. It's better to have an innate ability for such things, then you learn the spell and you're golden. Having a reserve in your sleeve is always a plus in my book, especially if the sudden lost of mimicry could spell a death sentence, such as it derping on you in Order territory and a hero patrol has just popped from around the corner onto you...