Willis smiled and uttered the words of the spell. Robert suddenly felt a prickly feeling in his stomach and felt it rise up to his head. He looked down to see black hair growing all over, and his package increasing rapidly in size. He was suddenly extremley horny. "Ohhhhh..." Gasped Robert as hooves formed and his face became rather bovine. He was becoming extemley muscular and his dick was huge with tennis ball sized balls. He also grew rather tall, almost another foot and a half in fact. As the transformation completed Robert shot an unimaginable load 5 feet in the air. "Well, that turned out nicely." Said Willis in a sexy voice. "You must be tired. How bout we go take a break over there before we keep going?" Robert smiled and began to stroke his still hard cock.