You are in a maze of twisty little passages, all alike.

Quinn walks back to the junction and past Boona. He takes a few steps forward and looks in all directions at the maze of tunnels and groans. "I dunno about this. We can get lost for days in this dammed maze." He looks back towards Ruven, Jurgen and Bryony and shrugs. He closes his eyes, cups his hands behind his ears and listens for any sounds. 

Perception check: 11

Quinn hears nothing.

Boona continues shuffling south with a morose expression....

More small passages branch out in all directions. This rock has been heavily mined. Boona's back is beginning to cramp from hunching.

"This place is a maze," Bryony grumbles, trying to catch up with Quinn and Boona. "Let's go down one of these eastern passages."

The little halfling will walk past Quinn and head to the right and then immediately to the left as the tunnels keep branching off.

Bryony explores more of the cramped passages with her smoky torch, finding many half-finished or blocked. 

Jurgen reminds the party to stay together. "Guys. We can't get seperated in these tunnels. We need to stick together."

Quinn looks back at Jurgen and nods in agreement. He calls out to Boona in a low voice. "Don't get too far ahead of us. I'm gonna check in Bryony."

Quinn steps east towards the junction where Bryony went. He looks at Bryony and then takes two steps south trying to gauge if that tunnel will join up with Boona.

Bryony walks back to join Quinn. She nods at Jurgen. "Sorry, I didn't mean to go too far ahead," she says quietly. "There's just so many passages down here. It's all so confusing."

Ruven will send the lizard up as Quinn goes South.

Quinn finds the way directly south blocked.

...And that's when the huge yellowish ooze, clinging to a gap in the ceiling, drops upon Quinn.

Quinn and Bryony may roll initiative with Disadvantage. The rest of the party is yet unaware.

Yellow blob: 13  (If Quinn or Bryony roll higher, they may act first.)

Quinn's initiative: 6 w/disadvantage

Bryony may roll initiative with Disadvantage and act if she meets or beats a 12.

Note that because of the low ceiling in this area, Medium (and larger) creatures have disadvantage on melee weapon attack rolls except when fighting with light weapons.

Bryony Initiative w/ Disadvantage - 7

Bryony turns around, and suddenly a huge yellow blob falls right on Quinn! She is too surprised to react with any alacrity though.

The blob wallops Quinn with surprising force:
Pseudopod Attack vs. Quinn: 22.  Hit: 8 bludgeoning damage plus 2 acid damage.

Quinn and Bryony (20 feet away) may act, and then (presuming somebody shouts or calls or otherwise summons the rest of the party) everyone else may roll initiative (no longer at Disadvantage.)

Initiative:
√ Blob: 12
   Bryony: 7
   Quinn: 6

"Help!" Bryony cries out. "A blob is attacking Quinn!"

She rushes over and stabs the blob with her blades, trying not to accidentally stab Quinn in the process.

Shortsword - 13 to hit, 10 piercing damage

Dagger - 24 or 25 to hit (depending on if the first attack hit), 3 piercing damage

Sneak Attack - 9 piercing damage

Quinn is startled by the heavy weight of the ooze dropping down from above. The sheer mass of the thing smashes into him and then the acid sears his flesh. 

Quinn swings at the blob with Lightbringer

18 to hit (w/disadvantage) for 8 damage. 

Boona heard Bryony cry out and stood up smashing her head into the ceiling, " Ow...stupid rock."

She began making her way north, unsure where the shouting was coming from.

Bryony rushes over to help Quinn. The two of them do significant damage to the easy-to-strike goo.

Boona initiative: 13
(Held action unless >=12: "Boona rushes north, and still hearing the commotion, runs east toward the battle." Do you want her to Dash right into melee range, or hold back?)

Ruven and Jurgen should roll initiative and act if 12+
Ruven is 30' from visual ranged attack and ~55' from melee; lizard in visual range and 20' from melee.
Jurgen is 40' from visual ranged and ~60' from melee; Draco the same.