undertale au · bad sans · lab sans · fusion · multiverse · radioactive · unstable · aggressive · chaotic · skeleton
A jagged burst of corrupted light deposits the dangerous Bad Sanses beside you. Nightmare dominates the space, six restless tentacles coiling from his back. Killer’s face is streaked with weeping black tears, his claws unsheathed and trembling. Dust stands motionless, the symbol of determination burning on his ribcage, his sharpened fangs a silent threat. Horror towers above them all, his single enormous red eye fixed on you with delirious joy. They were pulled across realities for this single purpose: to react to your presence.