Larissa'a first swing misses but the second hits. (adding sneak attack damage for ally within 5')

Sneak Dmg: 5

Larissa second short sword doesn't deal as much damage as expected. The shadow takes 4 Dmg from her second swing.

The shadow enjoying the feeling of Kugu's ebbing strength stays where it is and continues squeezing Kugu.

Attack: 17 Damage: 11

If hit -4 Str.

(oof, sorry Kugu. That brings us to Brocc)

Symon Twist will reach out and touch the thing, Inflict Wounds (4d10 Necrotic dmg) Attack: 15 Damage: 10

 OCC Wow! 25% of possible dmg, that's FUBAR!

(Noted. It's still Brocc and Kugu before you though Symon. As a reminder I put the current initiative on the campaign page in the public notes: https://www.dndbeyond.com/campaigns/1041279)

(am I grappled? And if I am do I do a straight strength check to break it or athletics?)

(Oof. That was some sad sneak attack damage. D:)

(Now without further delays...)

Brocc sputters and even fumbles a bit before finally finding his nerve again. 'Stupid fool! You should've been the one' He thought, furrowing his brow in anger at himself. But rather than stand there feeling sorry for himself, the man clapped a hand on his shield and said, "Oh reflection of the light given malevolent compulsions, let the light of knowledge remind you of your place!" He barks, whipping the hand forward, and summoning a column of white flames to rain down upon the creature.

In whipping the hand back to his side, the warhammer appears once more from a cloud of mist within his grasp.

Action: Cast the Cantrip Sacred Flame and inflict 10 radiant damage on a failed Dexterity Save[DC 15].

"Brilliant light indeed, Master Brocc," Symon calls out to Brocc.  "we'll see the spawn back to Limbo where it belongs!"

(Kugu. You are not restrained. You can still move freely. It's an amorphous shape. Depending on this saving throw you may not need to do anything though)

Shadow save: 7

As the brilliant light fills the room and blast down on the shadow it's immediately apparent that using light was a good idea. The light blast holes through the shadow doing 20 Dmg and KILLING IT.

(You can save the spell slot Symon)

With a determed grunt Kugu takes out her great axe, ready to tear this thing to pieces, but realized it was already dead. "No fair," she grunts and puts her axe back. 

(Awesome attack, Brocc)

“What in the Nine Hell’s was that?”

Larissa cautiously looks up at the ceiling with her swords still out, ready for more surprises. 

(You asking that Larissa reminds me that I didn't explain trying to identify monsters to you or Kugu. I allow a free check, at any time, to recall any information a character might know about a monster. Depending on what you're facing it could be a Nature check, Arcana, History. Depending on how well you roll I will give you information about the monster right up to linking it if you get over DC25.)

(Cool!)

Even Brocc is wide-eyed from surprise. Although if/when spoken to directly or given a shake he promptly shakes his head and puffs out his little chest in prideful. "Yes, well, when you face the darkness, you always fight it with the light... or magic missiles. Those usually work rather fantastically. Though as for it is, well, uhm, uhh... g-give me a moment." Using just his index fingers, Brocc rubs at the sides of his temple a few times, humming out of tune.

"Yess... Yes... It is...."

Arcana or Nature: 12.
(if religion, then its a +3 instead. And wow! Okay dice. Uh.. I'll include a guidance roll as well if religion. Meant to before, but forgot to add in the actual dice roll: 2.)

And he goes off into a mercifully brief tangent about the creature, including its more dangerous qualities with all the pomp and self-righteousness of an old college professor teaching a class even minutia that only really they actually care about to so high a degree. "But to think he managed to contain one in one of these orbs is... unsettling, to say the least. They notoriously difficult to capture without some rather extreme methods usually involving the calculated death of another. Most unsettingly, I say, most unsettingly my dears." He shakes his head.

"Anyhow! Try the new key. See if it works. I doubt it, but always worth a shot. We should otherwise be secure enough in here to take a moment and recover our strength before unlikely releasing more unexpected foes in need of smiting."

"T'is a bleedin' 'ellspawn, th's wha' it bes!" Twist expostulates venomously. "Th' only thin' th' 'ates loight mor'na courtesan been inna buizness too long bes 'ellspawn."

He looks around at the others, "Well, wha' bes inna other globes, least th' ones tha' rattled an' dinna 'ave them thin's in'um?"  He will stand under #6 looking up at it suspiciously.  "Pr'bly a demon inna this un."

Symon sniffs distainfully, "A lot you'd know Twist! Except the topological surface found in the bottom of an ale mug, of course!  Any far fetched idea that comes swimming up out of those fumes you snatch up a carry on about as though it were written on stone tablets, or something, you souse!"

"Bleedin' fluff, go stuff yer 'ead up yer nether pipe!" Twist reply, voice rising in anger. "What th' 'ells d' ye knows 'boot anythin' but pretty, pretty!" He does a little jig, flapping his hands about in a 'dainty' manner.

Symons face becomes contorted with rage. "Just you wait Twisted! When you are not looking, I might just stuff your face into your sphincter!"

Symon Twist holds up his hands, "Na, com'on Symon ol' gel, le's wait 'til we bes outta this 'ole afore we bes gettin' t' battling royal loike, eh. Wouldn't wanna git yer knickers bunched oop inna wron' llooccaalliittyy, nae, we' woul' no do bes wishin' tha'! Makes yer face turn purple, makes me wanna 'ave a 'eart attack; frightful!"

OCC Jeez! These two will just not stop!  What else did we find, other than in the sixth globe?

With a snort, Kugu takes out her axe and stands beside him. "This time I hit the demon!"

“So uhm, can anyone see if the amulet and necklace are magical? And Kugu, are you going to try the third key?”

She takes out some string again and ties it to the second key before putting it in her pocket.

Kugu looks at Larissa confused then remembered the things she caught just before the attack. She looks back up at the gloves then back to the door. She hands the amulet and necklace to Larissa and goes over to try the 3rd key on the door. 

Brocc makes absolute zero effort at stopping Simon from arguing with outwardly himself. Truth be told, he was only really getting part of the conversation with any degree of actual understanding. Something that usually didn't happen the professor, and thus made him all the more interested in observing until the questions get brought up again. "Whatwhat? Ah, right, those. Well, like I was saying to your friend here earlier in regards to the potion, but with further clarification, I would rather not sit in the mud while performing the necessary ritual to confirm and identify any magical items in this mud." He expresses plainly.

"But if you prefer I sit in your lap, or lay in your arms like some wee babe, then by all means, I can start right now my dear. You'd just need to hold me up for approximately... twenty minutes or so. Thirty if I count your friends potion there." He said simply and appeared very serious about his compromise. While he was no stranger to trek through sludge-ridden environs, sitting around in it for longer than necessary.

(The creature was a shadow)

Trying the latest key from globe #3 yield no results. It also doesn't open the door.

As far as you all know you have nothing but time in here. Barring running out of food or water. You're welcome to Identify anything and take a Short Rest if you'd all like.

7  8  9

6  5  4

3  2  1

Here's where were at with the globes. I put #6 in green because that's the only odd one that doesn't make noise when shaken.

 With a huff, Kugu hands the key to Larissa, takes out her axe and goes back to stand by Symon and says again. "I want to hit the demon!"