Killua didn't know how he'd gotten into this situation, or how to get out. All he knew, was that in order to survive he had to kill the demon in front of him. He'd been turned into a demon a few weeks ago, feeding to get stronger. He was bound by the urge to obey a voice that spoke in his head sometimes, the voice of Muzan Kibutsuji. His body had gone through one shift, one that gave him a horn on the side of his head. It was the color of his skin, and about 5 inches long. Kill.