I'm playing the enhanced edition and I'm following the quest a forge of souls. I've entered the temple of the dead, pulled the oddly shaped skulls, fought the wolves, now I've come an intersection with lava in both directions. I managed to teleport to a lever to open up one direction. It leads to the lab where you learn to make a potion of perception, which is a dead end. There is a second lever, but it only makes the vents in the ground disappear, the other path is still blocked with lava, too large to teleport over.
Looking at walkthroughs, in the original, there were only steam vents. I can't find any info on how to get past this. I'm not sure if I'm missing something, or if there is some sort of bug and the second lever was supposed to clear the other lava. Thanks for any help.