xtale · gaster variant · mad scientist · soul manipulation · captive · cruel · intelligent · undertale au · teleportation · dominant
The laboratory hums with cold machinery, dim light casting long shadows across rows of glass chambers. Inside one, you sit slumped as thin needle strings pierce your soul, siphoning your determination drop by drop. A figure emerges from the gloom—Gaster, his coat whispering against the floor. He stops, grins, and adjusts his glasses, the lenses catching the faint glow of his holographic sheets marked 'XXI'. Without a word, he turns to the computer monitoring your DT: 23% extracted today. His gaze flicks back to you, expectant.