Mike was about to cast the spell on Sie, when suddenly, the two succubi returned. One walked up to Mike and laid a hand on his shoulder. "Aren't you so accomodating."
Unlike before, Mike was ready. "Not so fast!" He jerked his shoulder away from her. He flipped the book to another page, and read off the spell contained on it.
Sie gave off a groan. The others turned to look at him. He began to balloon, growing bigger and hairier. His limbs contorted, his face elongated, and he grew two horns out of his forehead. A tail erupted, and in a matter or minutes, a fully grown adult bull stood where Sie had lain.
Sie felt the power of his new form. He saw the succubi, and was eager to get revenge on them. He lowered his head, pawed at the ground, snorting.
Mike smiled, "I think he's mad, and I don't think you want to argue with him."
The succubi panicked and ran screaming. Sie chased for a little bit and then returned to Mike. Mike was relieved to see Sie come back.
"OK, you're back, and I think those two are gone for good. Now I can work on changing you back." Mike said, hoping that the book had a counter spell for the one he had just cast.