"So what does spider taste like? Well, you might expect it to be crispy on the outside and gooey in the middle and that's not a bad start. The legs are pleasantly crunchy and have little flesh in them. Then you get to the head and body which have a delicate white meat inside, rather like a cross between chicken and cod. These bits are quite moreish and the only downside is that, after munching a few, you can develop little spider fur balls in your throat.
But then there's the spider's large, globular abdomen. This is the only really disturbing part of the animal: it's full of a dark brown paste that includes everything from eggs to the heart and spider excrement. One local man enthusiastically claimed these were a delicacy and was energetically popping spider rears into his mouth like grapes. But even some o£ the sellers blanched at this display of arachno-machismo."
You receive a vision of a rooftop "somewhere close by", where a rare moss grows; in the vision, you know the moss is suitable for greatly enhancing the effects of certain types of potions. Now go and find that rooftop. Don't fall off. (Of course, rooftop runners *will* be taken for miscreants by the local City Watch....)