I've run in to a couple of stone obstacles in the temple that I can't pass--although I've tried hard to do so. It's not clear if I don't actually need to get by them or if I just haven't figured how to destroy or bypass them.
One is on the stairs heading northwest from the north end of the Library. The other is on the stairs heading south near the west end of Leandra's office.
I have Leandra's spell and lab notes, I've killed Kaden and his Immaculate friends, I've destroyed the bone totem, and escaped from the mines. Is there anything I missed?