Lounging around in the Cantina, Kolburn kept a watchful, yet unassuming eye on those around him as he finished the last morsels of what passed for a meal in this joint. Brushing off the crumbs, he glanced round, careful not to make eye contact with any of the other patrons who might later remember him as he made his way unobserved to the entrance and out into the cold of the port. He would come back and pay off his mounting tab, when he next came across a few credits, or found another odd job. After all, he wasn’t completely without his honour, unlike some people.
On a location with numerous webs, and at least one big spider, there is a something inside a cocoon. It is humanoid in shape, still moving. If the heroes free it (not before they kill or drive away the spiders), they meet a ... zombie!
The poor zombie wandered the dungeon alone, and tried to kill a big living creature (= a spider). The spider used the usual treatment, even if this victim did not look tasty. The zombie can be easily killed as any other zombie. It got but several doses of spider-poison, so can be something worth if it is extracted. You can mention to a druid or ranger the fact the spider had no poison anymore.