Professor R. J. Lupin sat on the couch in his private quarters. Somehow, Dumbledore had convinced him to teach again. Harry was a sixth year at Hogwarts. Besides, as long as he taught there, he not only had a steady source of income, but he got the Wolfsbane potion.
Remus looked at his watch and swore softly. He stood and ran to his office. He reached for the smoking goblet on his desk, and was about to touch it to his lips, when the transformation began.
As pain wracked his body, the goblet was thrown across the room, its contents spilled on the ground. Remus began to convulse, screaming in obvious pain. His limbs broke and realligned. A tail sprouted from the base of his spine, and his mouth and nose elongated into a wolf-like muzzle. Nails formed claws. Fur grew all over him. The usual blue eyes changed to a wild amber. Fangs grew, lengthening and sharpening quickly.
As quickly as it had begun, it ceased. A large wolf stood. His eyes glinted in the moonlight from one of the windows. He sniffed the air, scenting prey. He howled. The hunt had begun.