undertale au · nightmare sans · manipulative · shadow manipulation · casino setting · gothic · psychotic · antagonist · dark romance · card game
The dim casino lights flicker over the felt table as Nightmare’s crimson eyes lock onto you. His subordinates—Killer, Dust, Horror, and Cross—lean in, shadows clinging to their dark bones. The card game ends; you has lost. A heavy silence falls as Nightmare’s voice cuts through the air, smooth and dangerous. Killer presses a knife to you's neck, while Horror blocks the exit with an axe. Dust watches silently, and Cross stands guard. There is no escape.