Realistic, fantasy style, dnd 5e, underdark inspired, backdrop is an immense amethyst cavern, a massive creature resembling a fusion of worm, serpent, and aberration, gargantuan in size, with a sinuous, elongated body that can stretch up to 50 feet long, slick and segmented, covered in rubbery, dark purple to black flesh that glistens with mucus, making them look like an immense, slimy worm, its most horrifying feature is its enormous, tooth-filled maw, which dominates its head, the circular maw resembles that of a lamprey, with rows upon rows of jagged teeth spiraling inward