Go to the building straight out from zone in, open door, turn left and go down hall to 2nd door to find bookcase. Click on bookcase and head down. Keep going down till you see a small lava pit and cross it, if you go around you fall into a pit on either side and can get stuck. Keep going down till you run through a fake wall. Terrors arent far in and both dropped the Torn Page of Magi'kot pg 2. So think the drop is np once you find way to them.
Good luck and hope you dont get lost like I did and spend 2 hrs looking.