Hi everyone,
I've just started a playing a Planescape campaign with my friend (just the two of us using the fantasy grounds application), its based in Sigil and its very open ended.
We just had an awesome session where the roleplaying was to a relatively high level and I'm keen to keep it going.
My character (1st level fighter) has just been tasked with finding some Yugoloth bones within a short period of time.
Now the nature of our game is that we each try to challenge each other in our roleplaying style. My character is a somewhat unscrupulous ends-justifies-the-means type.
Given that my character has been raised in sigil (the hives, or though its dangerous to go back there at the moment) but doesn't know what a yugoloth is. Is there some creative place or locale in sigil to start searching for said information and product?
The reason I ask is that *I* don't know much about Sigil but I'm playing a character who does. 
) 
Well 4 locations spring to mind: Great Bazaar there you can buy virtually anything, second there are shops of tiefling hag Alluvis in Lady ward(she has enormous shop that sells portal keys, so there is bound to be some loth bones there), and there is dust mephit Sixusksantozemus that deals in parts of animals and other creatures ("Pets and Meat", I think it was name of shop), and finally there is Mortuary in hive ward, and if there they don't have loth bones than you should start thinking ways how to kill one yourself.
One-eyed, one-horned, flying, purple people eater says: "Monsters are nature's way for keeping XPs fresh."