Rocks and loose debris clatter underfoot as Aria and Mir advance towards the back of the cave.  It starts to become more narrow, and then bends to the right at about a 90° angle.  Around the bend, the tunnel splits around a pillar of rock, which blocks your view.

Mir whispers, "We should probably get the others before we continue on." He makes his way back to the larger room and motions to Dorno and Thresher to follow.

"Before we head on do any of you have any healing abilities to share? Those skeletons hit me pretty hard."

(OOC: I'm at 3 hp.)

(I’ve got nothing, ☹️ )

Aria sang a brief scale and a shimmer of golden light rippled over Thresher's form.

Cure Wounds healing: 7

(Are you all moving ahead now?)

(Yeah, let’s do that.)

"Thanks." Thresher nods at Aria.

"Alright lets go." She follows the other two.

Stealth: 5

Around the pillar of rock, the path becomes one again, before splitting once more around a larger section of rock.  The paths then briefly join together again, before opening up into a semi-furnished room:

An oval cavern opens here, forty feet wide and sixty feet long. Dark purple tapestries hang on the walls. At the center stands a pedestal fashioned of severed arms arranged to clutch one another in a cone. Cradled in the uppermost hands is a glowing crystal sphere. A dark sigil with an eyelike slit floats above the sphere.

Thresher looks around the room for any hidden combatants.

Perception: 11

Thresher:

Mir will draw his rapier and shield, then check behind the tapestries for treasure or foes.
Stealth 16 Perception 6

"We are not alone." Thresher whispers to the others.

"Be careful." She readies herself for the first sign of danger, great axe clutched tightly in her hands.

(Which wall is Mir checking?)

(Opposite of Thresher)

(Thresher was checking out the wall opposite to you, so there's no wall opposite that one other than the entrance.  I mostly wanted to make sure Mir wasn't checking the back wall.)

Mir finds nothing.  The closest thing to treasure he sees is the glowing orb in the center of the room.

He does notice what Thresher does though, that the curtains in the back are rustling slightly.

(Yeah, he was just doing a side wall, not the same as Thresher.) Mir will flank Thresher, ready with his Rapier for the big reveal. (If Thresher doesn't pull the tapestry down, Mir will.)

(One of you, make a Strength check with advantage, just for fun.)

(here goes!)

STR: 17

(Mir will be the Help, and let Thresher do the Str check with advantage.)

EDIT: (Nevermind, I guess Aria has it covered.)