While Mildred is comforting Tabby, the dog gets on her broomstick and goes flying out the window- and he’s good at it. That night, when doing her lantern duties, she finds a stray dog, and takes him back to her room, much to Tabby’s displeasure. However Mildred is still no good at flying with Tabby. Mildred decides to enter the broomstick competition to win the wishing star, and use it to give her mother powers. They say that no ordinary potion can give a person magic powers, but Mildred wonders about an extra-ordinary one. In potions class, she tells Maud and Enid, who are using a switching potion to swap places. Mildred goes to see Miss Cackle and comments about her Mum’s art degree, then asks if Miss Cackle can make her mother a witch, but Miss Cackle says that witches aren’t allowed to give non-magical people magic powers. Julie leaves the mirror to answer to the door (her new watercolours have arrived) and Mildred sees that Julie has painted pictures of herself as a witch. Meanwhile, Mildred makes a mirror call to her mum, who has just finished an art degree. Sybil then crash lands on her broom, and is dressed like Mildred, with her hair in plaits. Afterwards, Clarice and Beatrice ask Ethel where Sybil is, as they haven’t seen her yet. It is announced that there will be a broomstick competition with the Grand Wizard judging, and the winner will receive a ‘Wishing Star’- a powerful potion that can do nearly anything.

This means she has to light all the lanterns around the school at night, and then get up early in the morning to put them out again. Miss Hardbroom says that as Mildred is now an official witch, she should have official witching duties, and makes her lantern monitor. Mildred has been given an award for her action in restoring the founding stone, and has improved in her classes, much to Ethel’s annoyance. Mildred and her classmates return for their third year at Miss Cackle's Academy for Witches. But Mildred‘s thwarted by bitter rival Ethel Hallow and both girls are disqualified – only for Mildred to make a surprising discovery. She‘s determined to win a Wishing Star so she can give Julie magic herself. When Miss Cackle refuses Mildred’s request to make her mum Julie magical, angry Mildred enters the Great Wizard’s broomstick-flying contest.

The worst witch and the wishing star