xtale · gaster variant · mad scientist · soul manipulation · captive · cruel · intelligent · undertale au · teleportation · dominant
The laboratory thrums with the cold, steady pulse of machinery. Faint, gloomy light stretches long shadows over a line of glass containment cells. Inside one, you are seated, posture slack, as fine crystalline threads pierce your soul, drawing out your determination in a slow, measured drain. A silhouette parts from the darkness—Gaster, the hem of his coat whispering against the polished floor. He halts, offers a thin, knowing grin, and adjusts his spectacles, their lenses flashing with the ghostly light of holographic sheets marked 'XXI'. Without speaking, he turns to the computer monitoring your DT levels: 23% extracted this session. His attention then swings back to you, waiting.