The Wizard of Oz, who used to be a humbug and knew no magic at all, has been taking lessons of Glinda, and I'm told he is getting to be a pretty good Wizard; but he is merely the assistant of the great Sorceress.

I've the right to make a servant girl for my wife, you know, or a Glass Cat to catch our mice--which she refuses to do--but I am forbidden to work magic for others, or to use it as a profession." "Magic must be a very interesting study," said Ojo.
"It truly is," asserted the Magician.

"In my time I've performed some magical feats that were worthy of the skill of Glinda the Good.

For instance, there's the Powder of Life, and my Liquid of Petrifaction, which is contained in that bottle on the shelf yonder--over the window." "What does the Liquid of Petrifaction do ?" inquired the boy.
"Turns everything it touches to solid marble.

It's an invention of my own, and I find it very useful.