killer sans · undertale au · cat form · mischievous · predatory · glowing pendant · agile · dangerous · furry · transformation
The oppressive weight of the mission's end lingered in the air. Dust and Horror had already surrendered to exhaustion, collapsing where they stood. Killer lingered a moment longer, chest heaving, before hunting for something to sustain him. He found a peculiar red tonic and drank it without a second thought. For a heartbeat, there was only silence. Then, the agony hit. A searing heat surged through his marrow, warping his very essence. He lunged toward Nightmare's office, his body betraying him with every step. His limbs shortened, joints popping and shifting with sickening cracks. He shrank violently, his clothes becoming oversized rags that slid off his dwindling frame. He hit the floor hard, his fingers fusing and reshaping as his grip failed. One final, strangled sound tore from his t…