So, I was struck by inspiration and wrote a thing.
DM: "Your party enters the tavern, dejected after a week of being rejected or expelled from every library in Nuln. (Seriously, how do you fail *that* many diplomacy checks? Jeez.) It's a dim, smoky place, with a shadowy figure in every corner. The bar is relatively crowded, but there's plenty of open tables to choose from. What do you do?"
Imperial Dwarf: "I'll go grab us some drinks at the bar."
Journeyman Bright Wizard: "I'll grab us a table near one of the shadowy corners."
DM: Alright, you collect your drinks and gather around a table. At the table next to yours is an older man in grey, with... something strange about his beard. Roll perception.
ID: 4.
JBW: 9?
Ratcatcher 1: Nat 1, wow.
Wood Elf: 17.
Ratcatcher 2: 8 for me. But my dog rolled a 19?
DM: Sadly, the dog doesn't have the context for this, but your elven eyes see that the edges of his beard seem to flicker and dissolve into smoke occasionally.
Wood Elf: Oh wow. Demon?
R1: Probably. Should we kill it?
R2: Eh, might as well let him give us a quest first and kill him when he inevitably turns into a monster and betrays us at the end.
ID: Heh, sure, that works.
JBW: There's, probably a lot of things he could be. Might as well leave it alone for now. Anyways, so what are we going to do next? If we can't get any books about skaven where will we even start on following up on that lead we got from the Cult of Yellow Fangs?
R1: Well, we could always just head into the tunnels and wait to get ambushed.
WE: Pass.
ID: We could try to find some other dwarves to ask? They'd probably know. (Can't believe I crit failed that history check to see what I knew about skaven...)
R2: Heck, maybe the dwarves have a library that could help us translate those letters we found.
DM: Suddenly, the man with the smoky beard is standing at your table, grinning down at you all. "A dwarven library eh? Letters to translate? I know just the place. If you don't mind doing a little job, I'm sure I could get you an in."
R1: I panic at the sudden voice and punch him. *rolls* 19!
DM: Wow. *rolls* He vanishes before you touch him and reappears on the other side of the table. "Now, that wasn't very polite. But I'll give it a pass just the once." *passes a note to JBW*
JBW: Huh.
WE: "Sorry about that, he's, jumpy."
ID: Well, definitely *something* supernatural.
R2: "So, what's the job, and what's the place?"
DM: "Far to the south, in Karak Eight Peaks, lies the library of Kron-Azril-Ungol. The owner of said library has gathered lore and knowledge from across the world to it, including copying most of what you could find in this very city. Sadly, the librarians are having some magical difficulties and have lost all ability to speak. To remedy this, the Lady Weber, head of the library, commissioned an item from the mysterious Grey Lords of Laurelorn. She would have collected it herself, but she had urgent business. Something about an 'Elfcation', and how she wouldn't have free AP for years if she put it off again? Hm. Regardless, if you're willing, take this letter to the Grey Lords and bring the item south to Eight Peaks and I'm sure the librarians will help you learn whatever you could need."
WE: Oh wow. A trip home. That... will be interesting.
JBW: Hey, backstory tie in! We definitely have to do it. *rolls something after being prompted by the DM and gets another note.* Oh, cool.
R2: A dwarven library commissioning something from elves? Sounds fishy.
ID: Well, if it gets us the info, we'll deal with whatever shady stuff is up. Let's do it.
*Months of adventuring across the empire, seeing a cool fog bridge, retrieving the item and doing it all again back down the continent to eight peaks later, they've delivered the item and are about to receive entry into the library*
DM: You step inside the grand doors, passing into the library at long last. In the distance rows of stone shelves loaded with books extend as far as you can see. In front of you is what you assume to be a reception desk manned by a human. Roll perception.
R2: 6.
R1: Nat 20!
WE: Ugh, 5.
ID: 10.
JBW: 3.
DM: *passes note to R1*
R1: AHHH SPIDERS! I DRAW MY AXE AND THROW IT AT THE ONE ON THE CEILING ABOVE US.
DM: ... Alright, roll it.
R1: 18! Awesome!
ID: What is going on?
WE: Spiders? Like, normal or monstrous?
R2: This is going to be a mess, isn't it?
JBW: Oh, yeah, I forgot to share that note I got about this place, didn't I? Crap.
WE: Uhh...
DM: Your axe flies true, punching into the carapace of the horse sized spider lurking on the ceiling above you. An unholy shrieking arises throughout the library. A cunningly hidden trapdoor lifts in front of the party and several spiders lunge out at R1. *rolls* *rolls* *rolls* Roll 3 con saves.
R1: *rolls* Uhh.... 18, 7, 9? That sounds bad.
DM: You collapse, entirely paralyzed as several spiders dogpile (spiderpile?) you.
JBW: EVERYONE STOP! THESE ARE THE LIBRARIANS!
Entire party: "WHAT?!"