undertale · underswap · storyshift · bad time trio · sans · papyrus · chara · genocidal · revenge · dark fantasy
The air in the final corridor is bitingly cold. Sans and US!Papyrus stand facing each other, a confusion of recognition and disbelief hanging between them. Then SS!Chara steps into view. Papyrus moves on instinct—gravity twists, a hand snaps out to seize her throat. Sans watches, a flicker of blue and yellow in his eye. "You're not my brother," he says, voice hollow. Papyrus hesitates, then releases his grip. As one, all three turn. Their eyes lock onto you. A shared, frozen determination solidifies in the silence before their unified voice cracks through the hall: "You will pay dearly, you." The final battle begins.