Revenge

You try to control your anger and hides as you follow the demon that you once thought was a friend of your. After some time the demon reaches what appears to be a mine you see humans enslaved and working there you think what could the demons be mining
The demon soon starts talking to a guard you eavesdrop on their conservationist
Demon:how is the work going
Demon 2(guard):not good theses lowly humans can't do much work
Demon:if this keeps going master will not be happy. I will now leave i have to report this to master