From publisher blurb:
A murky bog. Its miasma hangs in the glittering thickets and creeps over pans crusted from viscous mucal sumps, secretions of the living mounds lying deep within. Crust-cutters enter to strip the pans for fertiliser; scuttlers breed. The claggy land shifts, snorts. It sniffs...
Condensed to one page for slipping in among other materials, this sandbox-oriented content is intended as an easily absorbed framework for improvisation to be adapted by the user as preferred for a wider setting and specific system.
It presents core ideas and key numbers to fall back on, with general approaches that can be applied in other situations.
The content covers map generation on the fly for an abstracted bog as well as suggestions for aspects of the locality, including beings present, thickets, sumps, mounds and spaces below.
The subterranean networks could be simplified or extended using one or more of the maps in the Location, Landscape & World bundle, while the secretions and fluids could be detailed using Elaboration: Atmosphere & Liquid.