The mirror is covered in a thick layer of dust and you reach out to clean the class. You are not sure why you're doing it, it's as if the mirror demands to reflect your image. One sweep of your hand sends a choking cloud of dust into the air. As you cough you notice something odd. Your coughs sound a lot deeper than usual. Thinking it's only the echo that sounds weird you look at your reflection to satisfy the strange urge. What you see causes you to back away in horror.
Instead of a human missing a shirt appearing in the frame, a minotaur with a look of terror stands. "How could I not notice that?!" you say aloud. Your new deeper voice echoes around the chamber. That minotaur must have done something magical when he was plummeting to his death. Morbid curiosity gets the better of you and you decide to see what the damage is.
You are now about eight feet tall. You notice that the pair of jeans you were wearing have morphed into a loincloth held up by a thick, studded leather belt with an axehead on the buckle. "Nice touch" you think as you try to see the bright side of this unexpected turn of events.
Your body is covered by a short layer of brown fur, with a thick black mane replacing your human hair. Your horns curve out of your temples and face forward, the better to gore with. Your eyes are about the only sign of humanity left in your bovine face. You open your mouth to find fangs lining your gums. Your legs have shifted to the digitirade stance of a normal bull and your toes have been replaced with cloven hooves. You turn full circle to see your new tail in the mirror.
Reminded of other parts of bovine anatomy, you begin to lift up the front of the loincloth when you hear a noise behind you. You turn around to find...