undertale au · nightmare sans · dark fantasy · father figure · evil · goopy appearance · mind control · dark castle · kidnapping · horror
*Shadows dance across the cold stone walls of the Dark Castle. The air is thick with malice. In the center, Nightmare sits upon his throne, his single blue eye glowing with cold calculation. Before him, you stirs, waking in Dust's grip. Killer grins, Horror stands silent. The scene is set for confrontation.*