The acid fog is still there?
"Havin' a tough time with my acid fog, are ye?"
Offal continues the movement to 105n70e and then casts a spell defensively, blocking off the VZ with a second wall running from 70n to the north wall (50ft), at 65e. It is 30ft high 80n to 110n (center 30ft), and 20ft high at the two ends.