I stayed up a little too late while reading excerpts from the late AD&D supplement called Guide to Hell, a detailed look at the Nine Hells of Baator and the Lawful Evil Baatezu. I've never cared much for D&D's Devils but it did have some interesting little tidbits that I'll probably detail in another post.
This morning I had a dream inspired by what I read. A Lovecraftian Great Old One (unnamed in the dream) somehow took over a swampy layer of Baator. Due to declining power it was forced to assume a three-dimensional form based on its worshipers' beliefs: The entity appears as a light-skinned and powerfully built old man wearing buckskin robes. He has a long, neat white beard and equally neat white hair (think of Christopher Lee in his role as Saruman in LOTR). His eyes are pupilless and solid white. Twig-like horns emerge from the crown of his head. This interloper wanders through the swamp, untouched by layer's water, mud, or beasts. Explorers surveying the layer have discovered areas where bramble weaves together with many-eyed green tentacles to block off some areas. It is unknown what these eldritch cordons guard.