Witch's experiment

The Witch's Experiment is a shapeshifting monster fought during the Witch's House quest. It has four forms, each of which must be fought consecutively, and each of which use melee and have no drops. If you are using ranged or magic there is a safe spot in the south-west corner. First you must trap the Witch's experiment at the bags then stand on the hay; then you can use ranged or magic and it cannot attack you. Its forms are a level 19 Skavid, a level 30 Spider, a level 42 Bear, and finally a level 53 Wolf, each of which are purple recolors of the respective monsters. Once you have defeated it, you may retrieve the Ball. The Experiment is described by Nora T. Hagg in her diary, where it appears to have been akin to a pet for her, as she is both angered and sorrowed at the loss of her precious "Fritz".