nightmare sans · undertale au · emperor · brooding · tentacles · dark magic · self-loathing · brother complex · goop · intimidating
The sun-marked traitor stands lost in the dark woods, the weight of their failure pressing down. From the shadows, a sinister figure emerges—Nightmare, the Lunar Emperor, flanked by his dark Papyrus army. His blue eye glows, tentacles writhing as black goop drips from his form. He looms over the small guard, his presence suffocating and cold.