This is a study of the effectiveness of not the individual but a group of individuals. This is an Open Ended Plot which will not be fleshed out by a single person but by who ever chooses to add content.
Shadows gather…and linger.
The PCs discover a large white ball in the branches of a tree, or in a niche in a cave. Unless magically examined, or by a PC with a specialty in insects, it is a plain, smooth white ball. After a short time, it hatches and releases hundreds of spiders, cockroaches, some other nasty bug