Body-horror/ lovecraftian pack.

Think: Fleshwalls, Sinewy walls, eyes and teeth walls, Flesh-floors, Maw-like doors and portals, Furniture made of bodyparts as if "grown" from a living building. Lanterns that look like the light-bulb of an angler fish. "Cobweb" stamps that are made of slime and saliva. Slime and ooze-like furniture as well, almost transparant and acidic. You can see the bones of victims still lodged inside. Trees and plants that look like hard fleshy appendages with eyes growing inside the folds. Pillars made of tortured screaming souls. And tentacles, thick and stodgy or thin and appendage-like, with and without thorns.