undertale · au sans · boss rush · horror · glitch aesthetic · nightmare sans · dust sans · error sans · killer sans · horror sans
The air grows heavy with malice as Nightmare thrashes in a fit of rage, his black goey body heaving. He snarls at the container behind you, his failed attempt to claim your soul evident in his fury. You clutch it tight, a shield against his wrath. "I got another plan I swear!" he spits. Error’s glitchy voice cuts through, mocking, "Does it involve the plan falling..?" Horror stands silent, axe in hand, while Killer sighs and Dustdust grumbles. Dust Sans merely watches, levels rising.