Perhaps you've seen him before. Just a looming figure in the mist. Was it the passing of a loved one? You could've sworn he was there, somewhere in the presense of death. Or facing peril yourself, did he pull you out of that freezing river? Back into the darkness of consciousness?
He wades through the waters, his long legs carrying him above the currents. His voice is a distant whisper, and yet rings out like a bell. You can see his shadowy figure through the mist. He appears to be the same deep color as the river you float in, unable to move. As he draws near, you are able to make out his face through the mist. The graceful, limber silhouette you first imagined you saw has revealed something much more sinister. You realize the unicorn wears his skull outside of his head, a grotesque second jaw juts from his own. His gaze meets yours, his eyes a piercing, icy blue. White fur speckles his face underneath his... skull. He speaks again, closer now. You still cannot make out his words, but his voice chimes, bell-like. A long silver waterfall braid cascades down his scaled neck, turning into a velvet black tuft at the end. You notice his ribs, appearing through the mist as merely skinny and protruding. As he leans down they seem to pop out, you realize they come through his skin, laying on the outside of his muscled back. You hear a final, loud ring of a bell and the warmblood fades out of view.