We Are Legion

From publisher blurb:

We Are Legion delves into the bizarre, mysterious creatures known as the broodlings. These Monstrous Pages shed light on their vast and ancient conspiracy to dominate and destroy humankind. We Are Legion provides you with all the tools you need to make broodlings the central adversaries in an adventure or an entire campaign, and in the following pages you'll find their history, bizarre insectoid sentience, their grotesque reproductive cycle, as well as their inscrutable schemes.