"Of course, of course." the elementalist says. "We had no desire to keep you here this long. I hope there is more of your home left than there is of mine."
He clears his throat. "I, Ocosten, sixth artificer to the grand master of the Jistka Imperium, hereby release you from my service."
"I thank you," the shaitan responds. He removes his combat gear, leaving it for you as a token of appreciation and then vanishes.
You may now cross the room. This curling stairway ends abruptly at a wall of rubble made of jagged stonework and crystalline fragments. Detect magic reveals that there is something enchanted within.
You can go no further down this passage without days of work.
You perform one final search of the citadel. In the room with the blue platform, you find 25 sapphires that you can pry out of the wall (worth 100 gp each) as well as an improved ring of climbing and a medallion of thoughts. There is nothing else of value, and you find no more golems or elementalists before you depart.
Venture-Captain Obo thanks you for the care taken in your approach, emphasizing the trust that such care has earned the Pathfinder Society with the Concordance of Elements.