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The Young YookoohooYookoohoo witches are a powerful and dangerous sorceresses who specializes in transformations, using a strange and obscure type of magic. Both known Yookoohoo witches in Oz hail from the Gillikan country. They are able to alter their own appearance, but seldom do. Rather, they prefer changing the forms of others for amusement, malice, revenge, or profit.
Yookoohoo witches tend to be both wealthy and isolated. They enjoy their privacy and comfort. Their magic is both natural to themselves, and requires practice and study to master. Both known Yookoohoo witches use magical aides in their transformations.
Yoopette is a third Yookoohoo witch, apparently a young girl (although this may not be her true form). It is presumed she is the daughter or descendant of Mr. and Mrs. Yoop, who were 20-foot-tall giants. As Mrs. Yoop was a Yookoohoo witch, this may not be their natural forms.
Yookoohoo witches are able to transform any living creature into the form of any other living creature. This ability is powerful and comprehensive: Reera the Red famously transformed Polychrome, the Rainbow’s Daughter, a diaphanous but powerful faery, into a mundane yellow canary.
Yookoohoo magic is notoriously difficult to reverse, requiring both great magical power and great magical knowledge.
Yoopette has not yet completely mastered her magical abilities. She uses a locket to effect her transformations, but this probably only increases and augments her powers, rather than being the source of them.
The Sorceress Glinda the Good, ruler of the Quadling Country, considers magical transformation to be unethical, even immoral, as it necessarily involves deception. She believes things out to be left in their natural state and appearance.
“I never deal in transformations, for they are not honest, and no respectable sorceress likes to make things appear to be what they are not. Only unscrupulous witches use the art." -- see
The Tin Woodman of Oz, Glinda of Oz, The Marvelous Land of OzMRS. YOOP