Treacherous Footing

Treacherous footing means exactly that - the ground is slimy and damp, covered in decomposing fungi, slippery pebbles from a dry watercourse, the detritus of passing giant Slugs or gelatinous cubes, or what-have-you. Movement rate must be halved to avoid risks. Walking faster than this forces the PC to make a Dexterity check. Failure means the PC slips and falls, suffering d4 points of damage. Attempts to run mean automatic falling, for d4+2 points.