The staff served to amplify the witch's already impressive transmogrification skills, notably extending this effect more easily to other people.
An ancient and powerful magical tool, the Staff was first discovered by Evil-Lyn and Beast Man within a cave in the Crystal Sea. Disguised as a travelling sorceress named Majestra, the pair of villains made their way into the Royal Palace, where the Staff was put to good use transforming Beast Man into a copy of King Randor, as well as the real king into a goat and Orko into a cricket.
The Staff proved efficacious even against He-Man and his allies, turning Teela into a frog and He-Man himself into a golden statue. Skeletor and Evil-Lyn next assaulted Castle Grayskull, where the Staff turned the Sorceress partway into a defenseless tree. With the telepathic assistance of He-Man, however, the Sorceress used her own magic to overcome the Staff's spell and free the hero.
In the resulting battle, He-Man sliced the Staff in half, freeing all those it had changed. Evil-Lyn attempted to use the remaining half of the Staff, but all this accomplished was to turn her into a bizarre snake-like creature.