After the oaths have been taken, Wulgar starts to look around the room for clues, examining the rug, and then the two areas of rubble in the northeast and southern corners of the room, pulling them away and looking for any possible exit from the room.  He walks over to the globe, not really knowing/understanding what it does other than provide light and says "Hello, you bastards who put us in here ... are you there?  What do you want?  Show yourselves."  

"You do what Ragnar, Wulgar or I just did, now less talking and more searching human." Avarice says to Mulligan, increasingly annoyed over not finding any clues to how they could take on this reckoning.

As Wulgar starts talking to the driftglobe Avarice shakes his head slowly in disbelief. "And that one claims to be a feared pirate." He mumbles while continuing his search, followed by an eerie giggle.

Amidst the conversations and oaths being forged with the seal of blood, answers are difficult to come by in this barren, windowless, claustrophobic room. The snarling Tiefling takes a moment to peruse the masonry of the wall for any chinks or gaps which may indicate a hidden exit or entrance - and, despite the incredibly high rolls, he feels reasonably confident there are no hidden entrances leading to or from this room. 

What may disconcert him, however, is that the walls, floors, and ceiling have an aura of...weirdness to it. It's difficult to describe. These walls are about ready to crumble, yes - but no gap whatsoever exists, as if these walls were constructed flawlessly to withstand the ages. In fact, the nature of these walls and floors are almost unnatural. Magical in nature, certainly - but what they do? That is difficult to tell. Make an Arcana check. 

The red-scaled dragonborn begins sifting through the piles of wreckage along each side of the room, shifting apart crumbled picks of rock and stone with startling strength. Make me an Athletics check. All goes well until - THUNK. A claw hits material far more solid than rock. Sweeping away the spare debris, Wulgar can see a continuation of the same, rock-wall spanning the other six sides of this room. 

Judging from this, Wulgar can deduce - this debris was placed here, and these walls are most certainly not what they seem. 

Either way, Wulgar's uttering isn't answered - aside from the driftglobe, which drifts slightly towards the Dragonborn upon investigation. Arcana check if you so choose. 

Wulgar shifts aside the stone, using his muscles to shift stone instead of swinging an axe seems odd, but easy to him.  He’s ok with doing heavy lifting if needed.

Athletics :  29 

He also regards the orb with a curious look, wondering why it is following him.  “Are you spying on me?  What do you want?  How about some of this ya bastards!”  He grabs his crotch and looks hard at the orb wondering if someone is scrying on him.

Arcana :  5 

 Keyleth looks at Avarice with a frown. "The effects of a truth-compelling spell aren't enough for you? You insist on blood as well?"

Avarice arcana check regarding the magical walls, adviced by Vorax: 28

"It is up to you to seek my trust now, do as you wish, and for your own sake, focus now on getting yourself out of here...please. I would hope that someone competent enough to infiltrate a temple of Tiamat would have something to contribute with." Avarice answers Keyleth, clearly done with the squabbling over oaths now, continuing his study of the pillars.

Varan is intrigued that his attempts to manipulate the driftglobe with mage hand were completely ineffective, while Wulgar has elicited a reaction just by speaking to it.  He begins to suspect this is not a driftglobe at all.  Keeping an eye on the interactions with Wulgar and the "driftglobe" he will begin to inspect the center of the room.  There appears to be a circular mark on the floor about the same size as the "driftglobe"....

(edit:  Forgot to include the Investigation role: 13)

Ragnar watches as the others get down to search and investigate every nook and cranny of the room. He shrugs and decides to go over to the pillars, moving his hands over the old stone to see if there is anything special about them. 

Perception: 9

     Having sworn an oath (though not bloodied himself, which nobody seems to be paying attention to) Mulligan busies himself with investigating the room just as everyone else is.  He uses his Dancing Lights to give a clear and bright illumination on everything his looks at, he uses his Mage Hand to poke and prod and lift and shift everything and anything.  

     Mulligan spends the first portion of his time checking and examining the torches.  He attempts to lift them from their sconces with the Mage hand, turn and twist them, see if perhaps anything is written around them or such.  If all that proves fruitless he will move on to the carpet covering the center of the floor.  He will examine and study it, then he will roll it up and check out the floor below it for any hints of something beneath.

     "I don't suppose it can be as simple as breaking down a wall..." he jokes at one point, considering the option but not truly thinking it wise just yet.

Investigation: 7

Perception: 20

     "Or maybe you could just ask the drift globe what the way out is?" which is perhaps a less crazy starting option?

"Fine." Keyleth draws a shortsword and slices a shallow cut into one palm. "Sufficient?" Without waiting for a response, she begins inspecting the room's walls for anything out of place.

Investigation: 31

Avarice looks over at Keyleth, a little surprised now that she decided to go through with it after all. "Sufficient." He says with an approving nod before getting back to investigating the pillars.

Making some small talk to get to know his fellow prisoners:  "Ragnar, I have been thinking about your kingdom.  Did you have a rival or opponent in your climb to power?  I am recalling a contract that came my way... oh, perhaps 8 or 10 years ago.  'A cruel warlord is rising in the north and needs putting down.'  I'm quite sure you weren't the target.  It was something with an 'A'... something like... Addavan?  Admar?"  Varan pauses briefly to rub his forehead.  "In any event, I turned it down.  I was looking forward to a holiday and north wasn't the direction I planned to travel for my vacation.  I never saw the contract again and assume it was either fulfilled or forgotten.  Does any of this ring any bells?"

Ragnar pauses his investigation and seems to be in deep thought for a moment. He nods. 

"Ayedimir...that cruel bastard. We really could have used your help."

He leans against the pillar and speaks in a low monotone voice. 

"When I first united the tribes of Northumbria, the neighboring kingdoms were alarmed by our rising power. Ayedimir was a white Dragonborn, a brilliant strategist but an even more shrewd politician. He formed a coalition to oppose Northumbria, pledging to defeat us at all costs. The ensuing war lasted 5 years...5 long years."

Ragnar suddenly chuckles.

"It's ironic. Ayedimir became the very thing he swore to destroy. Anyone who spoke of surrender was executed. Those who began to dissent against his increasingly dictatorial rule- he had them gruesomely tortured and killed in public. For Ayedimir did not know that a leader must be neither cruel nor merciful when dispensing punishment- only just. And from all accounts, he enjoyed the pain he inflicted. To bolster the resistance, he built a cult of personality around himself and had his citizens swear an oath of undying loyalty."

He speaks with disapproval, yet a sense of admiration. 

"Eventually, he was killed by his own people. When my army stormed the capital of the Coalition, Ayedimir was found hanging from the balcony of his grandiose palace. An ignominious end for a larger-than-life leader. Yet, I must give him some credit. By the end of it all, his people were so weary of war and so ravaged by his exploitation that they were willing to submit to Northumbria. Also, there were things Ayedimir taught me."

Ragnar's voice lowers, looking around at the group, especially at Keyleth and Mulligan. He speaks so that only Varan could hear.

"He taught me how to inspire fear in the population, how to quell the flames of revolution, how to create undying loyalty despite hopeless odds. But his most important lesson: he taught me that no man or woman, despite how powerful and great, is immortal. Death is always waiting to catch us unaware, and we can only delay its cold embrace."

With that, he crosses his arms and his eyes brighten once more. He says to Varan, "But enough with the philosophizing. Tell me, my friend, if you were to take a contract to kill someone like me, how would you do it? I'm eager to hear."

Wulgar perks up at this as they are waiting, chimes in "Yeah, how would you?  I'm used to some pinhead trying to wave his sword at me, thinking he can get lucky and bring me down.  But you, I imagine that you use more...subtle methods to take someone out.  Don't you?  What would you do?"  So I can be on guard when we get out of this place Wulgar thinks.

Varan looks at Ragnar and then over to Wulgar.  His expression softens a bit. It is almost like the look a parent or mentor takes before they deliver a hard truth of the world to a naive ward... except the eyes.  The eyes remain distant and cold.  "You ask a hard question and one I suspect you won't enjoy the answer.  So for now let me tell you a bit about the business.  Later... if you still wish to know... ask me again how I would do it."

"A contract is an obligation, you have to understand.  Someone like me doesn't accept coin to 'try' to eliminate someone.  If I fail to remove a piece from the board, even if I survive the attempt, my own life is forfeit.  And even a successful kill, if done sloppily, could lead an investigator back to me or my client.  So every plan must be perfect.  Every hit must be a clean kill.  Witnesses can be OK.  Indeed many of my clients hire me to pull of public kills for spectacle or humiliation... but these still have to happen in a way that leaves no evidence."  He looks back to the spot on the floor he is investigating.  "So there are no rush jobs.  A professional takes their time... studies the mark... develops a plan... walks it through.  What are the variables?  Is there a spouse or bodyguard who could intervene unexpectedly?  Are there..." he trails off.  After a moment, he continues.  "I don't strike until it is already over. Nothing is left to chance and the mark is doomed... if I'm having a good day they never even know they're being killed until its finished."

"I'd need to study you both a bit before I can offer an idea of how I'd plan it out.  As I said... if you still want to hear it, ask me again some time later."

As Wulgar deals with the rubble littering two sides of the corridor, he eventually comes to the realization that these rocks aren't actually decayed parts of the walls nearby - they're something else entirely. A distraction, perhaps? A clue? The answer is solved when Wulgar flings a rock practically across the room with sheer might - crushing the stone entirely. And, strangely, enough, from the crumbled remains reveals a glittering, azure gemstone around the size of Wulgar's palm, only revealed by smashing the rock entirely. Further investigation by the hands of Keyleth reveals the presence of three more such gems strewn around the room - a ruby, an emerald, and an amethyst, each identically shaped. 

Wulgar can't, however, tell whether anyone is spying on his crude mannerisms - this is a driftglobe, after all. Perhaps there's something more to it, but Wulgar can't quite tell - he isn't very experienced with the arcane, after all.

Avarice, on the other hand - especially when whispered helpful clues from his familiar, ascertains these walls are of magical construction. Powerful magic, at that. Some properties only readable by one well-versed in magic would tell these walls seem to be...willed into existence by some creature or deity. Additionally, judging by the general architecture of the place, they don't seem to be anchored to anything. 

Avarice gets the feeling the party is floating in a demiplane. 

Ragnar, on the other hand, finds the pillars are meant primarily for show and architectural flair - surmising the same as Avarice, he can hazard a guess this prison-like room is unnatural in nature - while not quite ascertaining as much as Avarice did in that this place is actually some sort of demiplane, he can tell that this place certainly doesn't need the pillars to stand. 

Varan, with that Investigation check and after Mulligan rolls the carpet from the floor, you notice a small indentation directly in the center of the room - something likely needs to be slotted in, but you can't quite tell. 

"There is some really powerful magic in play here." Avarice says turning away from the pillars. "I believe this chamber is the creation of some deity or equally powerful entity and that we are in fact floating around in a demi plane. It seems we will be forced to play by this entity´s rules for now."
He then notices the gems and ponders if any of them would fit the indentation found in the floor. Investigation if needed, helped by Vorax:27

Keyleth grabs the gems she finds. All the same shape. She inspects them, trying to determine if they're magical at all.

Arcana: 17

     “Avie, I think we already knew there was big magic involved.  We did all somehow get her with none of us knowing how…” Mulligan said, a bit sarcastically but with a grin and a wink towards Keyleth.

     “It’s either a game, a test or a fight pit.  I’m hoping not a fight pit ‘cause most of you are scary as fudge,” he continues. “The lack of blood stains on the floor and walks is encouraging in that sense.  So we need figure out the game or test, though could be both at once I suppose…”

     Mulligan would check out the slot, trying to determine what may fit.  Is it round or narrow, go through the floor or more shallow?  
     Mulligan didn’t notice the jewels or he’d be breaking all the rocks looking for more ;)

Keyleth looks at Mulligan strangely. "Did you just wink at me?"