A Defensive Ward for Marsh Demons.
Marsh Demons are briefly mentioned in The Painted Man in the town of Tibbet's Brook.
Marsh Demons are native to swamps and marshy areas and are an amphibious form of wood demon. At home in both water and in the trees.
Swamp Demons are blotched green and brown, blending in to their surroundings, and will often hide in mud or shallow water, to spring on prey. They spit a thick, sticky slime that rots any organic material it comes in contact with.