(Since the above isn't introducing anything that would impede at least checking out the first room, I'm also going to throw that update here.)
Jesme eventually gets the door unlocked and rigged for an hour. As the door slides open for the first time in six years, flowers of thick greyish smoke come out of the room near the top of the door. The device has a very faint ticking noise to it, seeming to go off every half-second. The quick ticks seem to give some feeling of urgency to even standing around outside the door.
The first words out of the goblins mouth are surprise, but not in the way one might expect upon breaching into a sealed dungeon.
"Well I'll be! This doesn't look anything like any dungeon I've ever seen. Huh. It's cleaner in there than it is out here." Jesme then takes a few careful steps inside.
The acrid chemical smell of sulfur and burnt earth fills this chamber. The smooth stone walls are covered in an oily black film. Near the center of the room stands a fire-scarred black cauldron and three ominous bone pillars. Atop each pile of bones rests an open skull from which emanates a steady bubbling sound and a soft colored glow. This strange radiance illuminates three oil paintings hung at intervals across the north wall: a skeleton with a red apple, a blue jaybird, and a golden ring in its chest; a dark castle being shattered by a tidal wave, its highest towers marked with the shape of a rose; and a demon drinking from a golden goblet while holding a heart. A shelved alcove to the south east lies in shadows.
Jesme carefully inspects the pillars, the cauldron, the outside of the alcove, and the next door which seems fairly loose and off its hinges. After her inspection is complete, taking the better part of five minutes, she scans the hallway outside. It's pitch black, but the goblin girl seems to have at least some ability to see. After another minute she returns to the room, no worse for the wear.
"Well, there's a collapsed path to the north, so that's a sign that the guard was right. There's also three different doorways clearly visible ahead. I'm not sure what to do, I don't want to get in over my head here. As far as I can tell, none of this stuff is trapped or locked. The shelves have a bunch of bags of... well.. powder. Blue, red, and yellow. Same colors as the skulls glow. Then there's a bunch of lead bars, I count 20."
Skull Icons are where the three glowing skulls rest.
The cauldron is the big open black circle.
The paintings are along the north wall.
The alcove is in the south-east corner.