"I suppose I am the only Crooked Magician in all the world.

Some others are accused of being crooked, but I am the only genuine." He was really very crooked and Ojo wondered how he managed to do so many things with such a twisted body.

When he sat down upon a crooked chair that had been made to fit him, one knee was under his chin and the other near the small of his back; but he was a cheerful man and his face bore a pleasant and agreeable expression.
"I am not allowed to perform magic, except for my own amusement," he told his visitors, as he lighted a pipe with a crooked stem and began to smoke.

"Too many people were working magic in the Land of Oz, and so our lovely Princess Ozma put a stop to it.

I think she was quite right.
There were several wicked Witches who caused a lot of trouble; but now they are all out of business and only the great Sorceress, Glinda the Good, is permitted to practice her arts, which never harm anybody.