Yeah spells key
like gekko said.
******SPOILER FOR THOSE THAT DIDN'T PLAY TROUGH CHAPTER 6 ******
I passed that and I'm now stuck with the archeologist. I got down to the 4 rooms with the guard and the 3 rune spell protected and blew them away and can't go further I found the whole for a dog entrance but I cannot summon anything yet and can't find an animal to take control over or something. I got the silver neckless down here but nothing else. There has to be something about the stonr I push in the walls of the rooms, but they retract.