Marshwalker

These massive, vaguely-humanoid shapes are made of moss, vines, and loam; they look to be a part of the swamp floor itself rising up from the earth. While the nature of these lumbering, predatory plant colonies is unclear, they are highly aggressive despite lack of any noticeable intelligence. They have no typical senses, but are able to sense the vibrations of prey from their hiding places in shallow swampwater or burrows, seemingly no more than a pile of plant matter. They "feed" by literally throwing their massive bulk upon their prey, smothering it beneath them, and slowly absorbing it through their roots over the course of several weeks as nothing more than a mossy burial mound.

Marshwalkers are very deadly to travelers, as they have no vital organs and cannot be fooled by invisibility. They are also largely unaffected by electrical attacks, but are vulnerable to fire.