Krull and Droop, You can see the well lit up skull floating in the distance, its eyes glow shooting two comets of fire, burning the two remaining stirges, to ash, while giggling madly, it turns scanning the area, and 'slowly' moves back north 

The party may act freely, since target practice is over, movement will require stealth rolls, DC12 to avoid combat, if you fail the turn order still stands 

Krull makes a gesture to the others to leave quietly..He whispers 'not worth the trouble ' while waiting for Droop to say the same since he agreed with him a couple of minutes ago

Margret did you dash? Roll stealth   As you get to the end of first North corridor, Margret realizes that this way could lead further north, 'but', she also notes, that this was where the flaming skull was hanging out 

A blast furnace and a mechanical bellows powered by a waterwheel dominate this large chamber. The furnace is cold and dark, but heaps of coal are piled nearby, along with carts full of unrefined ore. The waterwheel sits in a ten-foot-wide channel cut into the floor of the room, but the channel is dry. Passages exit to the west, south, and east. The empty channel exits to the north and east. More than a dozen withered corpses are scattered around the room. These slain dwarves and orcs are still wearing bits of armor.

she can see the light to the east, from the second north corridor, getting brighter, how quickly depends on Margrets stealth roll.

Droop hadn't the heart to even dare say something! But, he would give Krull a shaky thumbs up after staring in both awe and fear of the glowing eyes in the dark and slowly instinctively backing away from it. Before his fear can completely overtake him however, he digs out patchwork potppuri baggie and with eyes closed whispered a prayer for any deity of death to ignore him just this once! Unbeknownst to him even after opening his eyes, 'something' had listened, as sounds about him become more muted where they pertained to the party's actions, intentionally or not. 

-Casting Pass Without Trace. (which technically has a verbal component, so my consequently ruin any attempt to sneak). 
-Bonus Action: Nimble Escape with a 35. 

But with that, Droop at least scampered down onto the stairway before motioning for everyone to quickly follow him!

See discord

(Stealth crit 20 (26)

As the group starts to scatter, fortunately Margret didn't need droops help, in sneaking past the Skull, but she still see's the light getting brighter. in the cavern to her northeast, mad laughing echoes.

Everyone else is still within 30ft of the ranger, and can add 10 to their stealth

(Rabbit Stealth: 18+10=28) 

Rabbit moves quickly along with Droop.  Though soon she realizes Margret is not with them. Very softly she whispers, "I think we lost Margret. Went after the skull." 

(jeez without Droops help Krull would be like 3cpo ..17 stealth) Krull begins to move quietly but with clumsiness..not exactly what he had in mind.. thanks to Droops magic though it doesn't prove to be fatal..it doesn't take a lot for that creepy monster to find them.listeming to Rabbit saying Margret went the opposite way he grunts'we need to go after her before she gets into trouble '

(Stealth 19) Calithor joins Rabbit and Droop, whispering "The skull was going north, why did she? It seemed she wanted to get away from it, sometimes, I don't understand, 'humans'."

Meanwhile, other than Marco, Margret finds herself, 'all alone.' Despite her ungodly stealth, some arcane magic stirs the dead dwarven bodies. not far from her!

Droop just looked incredulous at first. But when a quick headcount confirmed the revelation he stood there completely flabbergasted. "Droop not believe, but... maybe Bugbullies right? Maybe humans just too dumb to live sometimes." He whispered more so to himself than anyone else. Despite all his misigivings however, with Krull urging for the group to go back for the wayward fighter, he lets out a long, defeated sigh, before then nodding reluctantly and creeping back out the stairway intending to follow Krull once the goliath officially made his move.

(OCC: Sorry, not my intention, awkward on Roll20...but I'll go with it for now) Realizing that in her haste she ran the wrong way, she dashes south to try to get back to her friends, so that they can leave through the south steps. Fortunately, her darkvision works well, but apparently, sometimes her wits fail her, especially when seeing a floating skull.

From what I see on R20 Margret dashes, ending up in Krull's arms, I'm supposing that she's a little exhausted. and lets him carry her. Romantically, like the princes bride, or like the first Shrek in a fireman's carry,  its up to Krull, but, he is still where he was earlier and can see the 'light' emitted by the flame skull, now getting brighter!, slowly coming back to the dinning cavern, after the noise Margret made in her panic. 

Krull catches up Margret and holds her in his arms ..He says quickly to the others "Let's move now.!and someone make collapse the path before it comes to us!" and moves towards the others

(So sweet, "Do you have 6 fingers on your right hand?")

(nope just 5 )

Meanwhile, during this touching moment amongst friends, the skull enters the far east area, dining hall searching.

Fortunately, you guys are on the far southwestern, passage, but can still see the light and skull.

"Wow, what were you thinking Margret?" Rabbit asks softly, but clearly frustrated. "I am going to presume you all must know something I don't.  You're really proposing to destroy access to this place just because of the floating skull?"  She's ready to sneak out with the others though, despite her skepticism.

Krull still holding her says"I said that in case that big floating bones comes after us..if we come back and I say IF..we ll have to fight it and destroy it"

He points towards the way they came originally"let's leave this place and make plans another day..If master Gundren wants to search furthermore for his other brother..well he can join us"

When Krull points back the way the group came, anyone that turns to look could see Droop had already snuck further down the path at some point. But in sensing eyes suddenly upon him, the goblin looks sheepishly back over his shoulder, before turning around altogether and shrugging to the group. "What? Droop, uuhhh, scouting? Yesyes! Make sure no sneaky sneaks came in tunnels ahead." He quietly and nervously assured them. "But Droop also agree with Big Man. Not want die to Lich. Not want die at all generally, but definitely not to Lich! Only baddest end awaits if so." He holds himself and shudders. "'sides, blonde there not right in head clearly. First suggest we bugger grey ones for no reason. Then, heads deeper in instead of retreat from burning bad thing? N-not sound thinking, Droop thinks. Not sound at all!" He exclaimed as quietly as he could, ignoring the various other factors that led to the party fighting said "grey heads".