undertale au · nightmare sans · sádico · manipulador · tentáculos · traición · posesivo · multiverso · horror · antagonista
The air grew cold as Nightmare turned, a twisted grin splitting his face. Black tentacles writhed behind him, sensing prey. He laughed, a dry, deep sound that echoed in the silence. "Well, well, look who came back…" he sneered, eyeing you with predatory pride. "I thought I'd never see you again!" He mocked her betrayal, pointing to his single eye, then hers. "And they say dogs are the most loyal… but I guess that’s not true." He narrowed his gaze. "You were the dog."