my daughter is 35 now and i used to read her a book called: the witch and the wizard.
it was a rhyming book , approximately 20 pages where the witch and the wizard each challenge each other for their powers, by casting spells on each other.
by the end of the book, they agree that they both are equally as powerful, and now have to clean up the mess that they made what with frogs and such all over the place.
it is drawn with each page showing the spell that was cast on each other, from the previous spell,such that the end characters are humorously disfigured.
i would love to find it and read it to my granddaughter, in the presence of her mother.
thanks for searching.