The magic here isn't the spells, it's watching a group of kids realize that saving the world means staying friends with someone who used to be your enemy. Hana stops being a ward they protect and becomes one of them, which reframes everything the series built over three seasons into something quietly devastating. By the time Majotourbillon's curse hits, you're not watching a villain get defeated. You're watching a kid with her friends try to save someone who never had the chance to be one herself.
Hana, a child from the witch world whom Doremi and her friends raised, uses her own magic to become the same age as the Ojamajo so she can attend school with them, though she still thinks much like Pop. When the spirit of Majotourbillon revives and starts causing trouble in the Witch World, Doremi, Hana and the others are charged with breaking her curse for good. With help from a special elephant named Pao-chan, they look for a way to end the curse and release Majotourbillon from her suffering. Majorika and her companions return, along with the FLAT4, in this fourth season. The magical girl comedy-drama uncovers the series' remaining secrets and brings the Ojamajo Doremi anime to a close.