swarm of dementor ghosts in tattered flowing robes, colassal monolithic stained glass graveyard, geometric cosmic lightning bolts, by laurie lipton, by roger dean, by gediminas pranckevicius, photorealistic, 8k resolution, zbrush, detailed and intricate, zdzislaw beksinski, realistic shadows, redshift, 3d rendering, volumetric lighting, dusk, matte painting, cg society, ghost, supernatural, hellscape, cosmic