The Transformation School, a particularly special faction among the nine major schools of witchcraft, is adept at transformation magic. Witches proficient in this art could effortlessly turn stone into gold, label deer as horses, transform into fierce beasts, and even take on the forms of the Great Dragon, Demon, Angel, and other Calamity Races.
In short, this is a very powerful school of magic. When practiced to the extreme, it's no less potent than the Seventy-two Transformations of myth and legend that Dorothy had heard about in her previous life. One could simply blow on an object, shout "Transform for me!", and then change that object into any desired shape.