The carvings to your left and right are equidistant. There are presumably 8 total with one being above the door you just entered and one at each "face" of an 8-sided die, if you think of it that way.
As the last of you enters the room to look around, the heavy stone door behind you closes, and you see another of those octopoid carvings above the door behind you. As the door slams shut, you see piles of bones (apparently dislodged by the slamming door) fall down into the pit from somewhere above. Based on how long passes until you hear them crash, you presume the floor of the pit is about 50 feet below you.
With the heavy mist, what you see is this:
8 foot wide stone block path circling around the room (about 230 feet to circle the whole thing). Each stone block has a faint carving on it of the following:
About 35 feet to your left and right (i.e., at every 1/8 interval of the circular room) are octopoid carvings in bas relief in stone. Each is about 8 foot in diameter with 8 lengthy arms spiraling around it. Another similar carving is above the door behind you. They look like this:
The mist obscures the rest of the room, but you presume there are 8 octopoid carvings at each 45 degree angle of the room.
The ceiling is above you beyond your view in the mist.
The pit is presumably about 75 feet across and sinks into darkness below and above. All spaces between the octopoid carvings are covered with bones of all types, similar to the catacombs you were just in.
The green glowing orb is bobbing around in the central area of the pit. It moves slightly to the left and right. The movements are erratic enough that you think it may be something sentient or controlled by something sentient.
This message was last edited by the GM at 01:43, Tue 03 Mar 2020.