Bileswamp

The Bileswamp is a subplane of the In-Between. It is filled with hair like plants, boils filled with poison, ready to burst at the lightest touch, and of course, bile. Large portions of the land are pocked by acid pools. These range typically between a few inches and a few feet deep, but can in some places be much much deeper. There are tunnels filled with acid that lead deep into the ground. These often become the living space for oozes and acid resistant monsters.
The ground is hard and calcified, acting like a ceramic, chipping and breaking.  The air while breathable, is acidic. Unmaintained objects start to break apart over time more rapidly than normal. Things quickly grow a green slimy film over them.
In general the acid does 1d10 per round that a creature is more than knee deep in it. A few inches of it only does 1d4.

Related Materials

• Bilestone