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In page Magica De Spell:

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Magica De Spell is a very powerful witch with magical powers that include the ability to teleport over long distances, flight, the power to conjure and transmute matter, and the ability to turn herself into any animal she wants. Her actual capability to wield magic varies from writer to writer. Carl Barks' incarnation is quite powerful, with her naivete being her only prominent weakness. Don Rosa's incarnation of Magica De Spell is, however, far more limited as she usually only uses magic through magical objects and in The Quest for Kalevala, Magica acknowledges she can't use magic without a wand.