In the Caverns Deep Below

Additional Prompt:  Horror, an enormous grotto temple carved out within a colossal grotto deep under the earth, a giant evil god looms over hundreds of his worshippers who crawl, dance and writhe of the ground beneath his dark gaze, his horrible body is elongated to a terrible height and out of his sides grow great sluggish root-like tentacles and crawl up towards the light, crashing into the sides of the tunnel hole above, the whole scene is nightmarish and styled like a cross between H. R. Giger and Gustave Doré meets The Garden of Earthly Delights by Hieronymus Bosch, bizarre mutated monsters crawl up the sides of the grotto with the ease of spiders, the dark god raises its terrifying face towards the light above, then looks down again on his hundreds of dark worshippers crawling before him on the ground