It's not like they're going to let him get seriously hurt, but maybe the fear will make him start to rethink his life choices and make better ones in the future.

They eventually reach the entrance to the inner chambers, and it is painfully obviously magical to the eyes of the three mages. There is a circular gate made of the same material as the Claw, three concentric rings with various carvings in the dragon tongue around a disc with three holes that match the position of the three claws of the Claw perfectly. Girna gingerly steps over to it—

—and Ruby pulls her back Telekinetically with just a tenth of a second to spare before the explosive rune turned her into a piece of charred meat.

"—what the fuck," she exclaims once she's had enough time to process how close she got to dying. She looks at Ruby—well, at the mages, she has no idea which of them saved her—and says, "Thank you. I, I owe you my life."

"Think nothing of it. Now, uh, let's disarm this trap before we keep going."

Between the three of them Erandur is best at safely undoing works of magic so he gets to it.

And when he's done Girna can safely insert the Claw's claws into the holes they go in...

...and immediately jump away as the rings start ponderously rotating and aligning with each other, the dust of thousands of years of disuse getting dislodged as the gate starts sinking into the floor to make way for them.

"Careful. We are almost certain to run into draugar."

Arvel also looks like that hadn't occurred to him, before.

Maybe this, uh, was in fact a terrible plan from start to finish.

Yeah, dude.

There are, in fact, draugar. They are not as deadly as the draugar in Saarthal were; maybe the preservation seal here was not as strong, or maybe they were just weaker people in life, who knows. What they are, however, is more numerous, as this is a proper dedicated tomb, with dozens of corpses. The mages deal with them handily but it is once again the case that if they didn't have healing they would have been screwed.

Having healing magic really is just cheating.

Well, assuming you survive any individual fights long enough to properly recover, anyway.

And unlike The Entire City Of Saarthal, the Barrow does have a proper purpose, and its design reflects that. While it's very extensive there are architectural cues and preferential directions towards... well... something.

Something

The massive chamber was probably a ritual sanctum of some kind, and given the dragon head carving (plus the fact that they haven't found it anywhere else) this seems like the most likely place for the dragonstone to be.

Also the treasure, if there is one.

And, well, if architectural cues weren't the only thing guiding Ruby, he didn't particularly want to bring up the voices again. At least until they got close enough to their source that the glow of the dragon carvings became unmistakeable.

Time to protagonist it up.

Once again the air grows cold and dark around him, the only light source being the word on the wall, and as he approaches it seeps into his very being, and now he understands.

FORCE, it says. Fus, it reads.

"What was that?" asks Arvel. "What just happened?"

"Dragonborn stuff," Onmund says, wryly.

Girna turns to stare at Ruby. "You're the cock-sucking Dragonborn?"

"Yes to both. Also, watch out."

The lid of what looked at first like a ritual table of some kind, and which turns out to have been a stone coffin, explodes outwards as the draugr that had been resting inside it wakes from the disturbance.

"Shor fuck me sideways," exclaims Girna, jumping back and reaching for her bow.

    This doesn't go amazing for her, though, as the draugr draws in a deep breath and Shouts: "Fus... ro dah!" The wall of force knocks her clean off her feet and into the air.

Erandur grabs her with a modified force net so she doesn't hit her head and die.

...well on the bright side this one isn't categorically immune to damage while connected to a magical energy source of immeasurable potency. It can burn.

"Shor's balls," exclaims Girna, once the draugr is no longer moving. "What in the fuck. What the fuck. You're Dragonborn. What the fuck."

    "I thought all Dragonborn were gone," says Arvel, coming out from where he hid throughout the fight.

"And the dragons were all dead, but now they're not. Wanna bet the dragonstone's in that coffin?"

It is.

What becomes clear after a while of scouring this chamber for loot, however, is that... the dragonstone probably was, itself, the supposed "treasure". There's some gold, sure, and some gems that will sell for a pretty penny, but they definitely cannot make all of the bandits here rich.

"Now you," says Girna, walking over to Arvel to grab him by the shirt, "are going to help me find Harknir and Bjorn, and Mara help you if they got hurt because of you." She turns around to look at the mages and shakes her head. "I didn't... expect. I guess. I don't know. I hope this helps with the dragons. That's over my head. I can't help with that. I'm just... I just wanna have something to eat every day."

"...I'm not expecting you to come with me or anything. I don't know what stories people tell about Dragonborn and heroes in Skyrim but the gods won't disgrace you for not lending all possible aid or whatever."

She looks like she doesn't 100% believe that but she lets it go. If Shor looks upon her when she dies and judges her unworthy because she didn't immediately join the cause of saving the realm, then... well, she wasn't really expecting much of her afterlife anwyay.

Ruby suspects Arvel is going to have a bad time. But he can't say he didn't bring it upon himself, and Ruby doesn't really want to get involved in this any more than he has to.

They make their way out of the ruins and then ride back to Whiterun.