[X] A glowing digging tool, with glyphs on the shaft. It even looks like it might have a spirit possessing it! That's got to be rare. They could use it to dig up more treasure, or maybe as a weapon, and it'll be useful somehow either way.
[X] They ask, eagerly, to go up another level, looking at you with wide eyes and seeming to trust that you'll do what's best and help them, for whatever reason.
[X] Excited by their treasure, they hurry to the elevator, apparently satisfied, or perhaps so overcome by this one piece of equipment that they can't think of anything but showing it off.
[X] A transparent tablet, although they couldn't tell what stone it could possibly be made from. The demon picked it up and showed Ayax how it reveals structures through the walls. Is this a seeing stone of some kind?
[X] Some sort of… armor? It's shaped like a jacket without sleeves, and glowing with so many glyphs Ayax can barely see the material. They'll never admit it to the demon, but Ayax likes the shininess more than whatever protection this armor gives.
[x] They charge ahead down a blind corridor in search of more treasure, with none of the fear and caution that you might exercise in such cases, considering how much about this facility might be unknown.