The Swampy Man lurks in the marsh, and locals won't go near it. The Shambling Mound isn't just a monster - it's nature's avatar, implacable and hungry. It heals from lightning (surprise, spellcasters), engulfs victims into its mass, and can scale from local swamp horror to mountain-sized dungeon immune system. Or maybe it's Mister Squishy, the village's domesticated compost heap that children ride like a massive, moist birthday pony. Nature doesn't care about your players. It simply is.