Quote from Damian_May >>

Lyngheid nodded, " Back to the river, check out those three tunnels; north and two west then head south."

 Back to the Smelting Cavern to investigate the dry river channels, and the tunnels leading in and out then?

Typical marching order?

Nyx smirks, "Well I don't think I had any issues with this oversized blob."

"So I don't know much about zombies but don't they generally fall apart if there master dies... unless the skull was not there master?"

Nyx will stick up the front, ahead of the group while stealthily.

Umbriel takes his usual spot near the middle of the group, a grim look of determination on his face. 

Baeshra will remain at or near the rear of the party, casting darkvision on himself to watch for anything trying to sneak up on them.

Perception: 8

Quote from IAmButADream >>

Nyx will stick up the front, ahead of the group while stealthily.

 Roll a stealth and a perception check. 

Quote from Ismenow >>

Baeshra will remain at or near the rear of the party, casting darkvision on himself to watch for anything trying to sneak up on them.

Perception: 8

 You don't see or hear anything unusual, except the periodic "BOOM" that crashes throughout.

Nyx Stealth: 23

Nyx Perception: 12

Nyx, you enter the Smelter Cavern about 10-15 feet in front of the group.  As soon as you creep in you see a familiar glow in the distance.  A Flameskull is floating near the ceiling to the north of the cavern!  It doesn't appear to have seen you yet.

Nyx holds her hand up and indicates for the group to stop. Slowly she creeps back to the group.

Once she get back to them around the corner, she whispers in a low voice. "That skull is alive again... it is floating back near the ceiling above the wheel near the north of the cavern."

" What? I thought we 'poofed' that thing? Did someone make another one?"

"Maybe they can't really die?"

Umbriel freezes in his tracks. "We need to disperse if we're going to travel through the chamber," he whispers. He will then quietly cast False Life on himself: 13

"I agree. So we do not get all hit by another fireball... Are we going to fight it again then because if we are, surprising it would be a good bet"

Baeshra peers over the shoulders of his allies, "It seems to stay here at least, perhaps there's a way around?"

"Wasn't there was a set of steps to the north of the room where we stayed?" asked Ireniana. 

"I believe there was an alternate passageway due West of where we rested, as well, if we want to explore other avenues."

The three exits from the cavern with the Forge of Spells where you rested are:

The Stairs going down to the north.  T
The west tunnel that leads to the Smelting Cavern with the Flameskull.
And the tunnel to the Mush-room cavern to the south.

https://www.dndbeyond.com/forums/d-d-beyond-general/play-by-post/60066-lost-mine-of-phandelver-campaign-thread?comment=3445

" Lets just sneak south and come back for him later....not that I'm great at sneaking..."

It sounds like the group is discussing two options:

1. Try to sneak over to the southern tunnel of the Smelter Cavern, at risk of the Flameskull spotting you.

2. Back in the cavern with the room with the Forge of Spells, try the stairs leading out of the cavern to the north.

Baeshra would move towards the other set of stairs, but slowly to see if the group follows, "We'll have to explore these anyway, and I'd rather not get cooked again today please."

Quote from Ismenow >>

Baeshra would move towards the other set of stairs, but slowly to see if the group follows, "We'll have to explore these anyway, and I'd rather not get cooked again today please."

 Lyngheid nodded to Baeshra, " Aye. I think your right. Back we go."