Gremryl senses many unseen threats beyond what his eyes can perceive.  Probably numbering in the dozens if he had to guess.

"Well, I guess that ***** of a derro found some friends. Elmo, it sounds like you'd better read us that note."

Gremryl with his keen sense:

"Lads... there are more than just that bow trained on us. Elmo might be best if ye read that note before theres blood shed..."

Mikey goes into his shell and then shouts out: "Follow my lead, boys!  When things go to hell, get in a shell!"

Responding to the voice, he continues to hold up the invoice  

“I have here a pre-paid invoice to Henstak's Worldy Wares.  I only be here to pick up what’s mine, a crossbow by the name of "Duerger's Spite".  A reputable place like this doesn’t treat its customers so shabbily normally Imagine.  Let us put down our arms and finish our business. We are both busy folk”. 

    There's an uncomfortable pause that fills the void...

A Female Voice - "Is that so..."

    You hear movement of stone and gears rumbling all around you.  From the left side of the room, about 20 ft up from the floor, a stone wall shifts, followed by a staircase unfolding to reach the floor level that you're standing on.  From the new alcove, a Derro emerges and walks towards Elmo.  Approaching Elmo he holds out his hand, palm face up...

Gremryl clutched sentinel a little tighter and in front of him. 

“Elmo, I believe that derro wants ye receipt lad. “

Elmo want to do a perception check to see if this is the Derro who instigated this who situation.  

16

re rolling, racial.  

18

Elmo, not recognizing this Derro to be the jerk, hands over the piece of paper

    The Derro takes the receipt from Elmo and pulls out an eye-glass to carefully read it.

Derro Assistant - "Master Ylsa...you should probably take a look at this..."  he says in a confounded tone of voice.

    Another momentary pause and then a low rumbling of shifting stones and grinding gears.  The warehouse staircases contort and reposition themselves to resemble a grand staircase leading to an upper floor where the ceiling has now been removed.

Derro Assistant - "Please proceed to the second floor.  And for your safety, please don't touch anything."  he then hands the receipt back to Elmo and continues to inspect each of you carefully with his eye-glass.

Elmo proceeds Up the stairs. 

Perception check during his walk up the stairs for that A hole Derro. 

16

Gremryl nods relaxed a bit and smiles. 

"There now, that's right and proper. Lead the way master Elmo!"

To derro that came down the stairs "much obliged,  I'll be keeping me hands to my side...(he casts a side long glance at elmo) wouldn't want to be touching anything at all!" 

Gremryl will follow Elmo up the stairs if he chooses to go first. 

“Come on mates. Let’s make this quick so we can find Droki.” 

“Elmo only be stealing hearts today my stout friend” 

    Elmo doesn't notice any Derro aside from the one that read the receipt with the eye-glass, however his senses reveal a couple dozen glints in the darkness areas of the first floor...likely the shine of metal on arrow tips.

“Of that you are a master! Ye halfing little scoundrel! One of the gayest ones I’ve seen. Let’s get what ye be looking for!”

Gremryl follows

To Rowland, Mikey, & Grem while walking “ I have been thinking,  maybe our mate shouldn’t be alone in this city.  We were followed by Drow just minutes ago.  Any one of us would be in A nice target for a kidnapping if we strolled off alone. Hopefully Leon doesn’t find himself in a lightly populated part of the city.” 

"Bah, master leon should be fine. Hes got dawnbringer with him.  We'll collect him at the conclusion of this and make our way to the chasm to look for the other fellow...."

Gremryl purposely doesnt mention the name of the derro yet since we are being led by a derro...