When you are doing the mission where you find the archaeologist there are stones with letters on them, there is a 'H' a 'T' a 'S' and a 'I'. The Demon door's name is HITS, but if you spell another word (Begining with an S... then a H... and a I... and then a T...) 2 Balverines will come out of nowhere and attack you... HAHA!!! S(_)CKS TO BE YOU!!!