go through the grave yard crypts i dont remember the order but the grave yard is "constantly changing" basicly this means that one route like if you go left going right will lead to a different area. Recommendation get you magic level or myst or something like that up if you looking for a fast boost in the original game getting the Latina goth or some name like that was a great way to boost the stat above 10.
Edit- The stat is Mystic i cant believe i didn't realize that i could see stats in the game description XD
I found it by chance but I retraced my steps and tried this method twice and it seemed to work. After you exit pixies lair, go up to the stairs that will take you back into the graveyard. I then went: Left, Down, Right and you will come to the mirror! its straight past there. If this is confusing, if youve found the shadow hands bit just go down and right and you should be there. I really hope this works for you! if not, keep exploring youll find it eventually like i did :)