I've been told to slay the night creature Ur Mistskinny in Pimpleumbras the Playful Holes. How can I find it? If I go to the
Quest log and
zoom, I'm pointed to the area where I got the quest.
Maybe that's where it lives! Some of the new night creatures (in 0.34.02) can successfully masquerade as citizens, so your questgiver might be asking you to kill someone who lives just across town. Of course, finding him is now going to be a minor exercise in tedium, since you just to walk around town talking to people until you find the right one. And I recommend killing him out of sight of other citizens; they might get upset.
If this is not the case, look at biomes and other locations nearby to see if there's one with the right name. Sometimes these "kill" quests are just kind of annoying.