Cockroach Swarm & Giant Cockroach

To do: Sic cockroaches on your PCs.  What not to do: Use live ones as minis.

For budding sellswords, the hardest part is finding that first adventure: one that will make their names without leaving them dead.  Exterminating a giant cockroach intrusion in the granary isn’t the most glamorous quest in the world, but if an adventuring party can do it—and keep their mouths shut—their talents will not go unnoticed by the local burghers.

A visit to a reputedly wise treant goes south when the seekers find only his rotted trunk, out from which pours a hissing swarm of cockroaches.

What’s worse than a shambling mound?  The Huge CR6 spitting cockroaches that share both the shambler’s fetid grotto and its immunity to electricity, due to long feasting on the mound’s vegetable matter.

—Pathfinder Bestiary 2 58