During one Hallows Eve, a witch made a deal with a demon. The witch was for a long time in service of the demon, and she was the demons favorite toy. Even though the demon already gave her enough powers just from her submitting to it, she still desired more. More to terrorize the towns that banished her, more to become feared far and wide, more to become the strongest witch alive. She decided to sell her soul to it.
While it is not uncommon for most people seeking services from demons to sell their souls, it is usually to fulfill their last wishes before death, and especially not from witches that already serve said demons. But this one was different, she was not like other witches that had no ambitions, no drive to become the best of the best, and the only way to get stronger from submission, is to sell her own mind and soul to her patron. The patron agreed, asking her once more "Are you truly willing to sell your soul, your mind, and to never leave hell. Are you sure you want to experience forever pain that I put you through?". She agreed to the demon demands and began to experience power surging through her body. She was in extasy from the excitement of her trying out any of her powers, and from waging wars and quenching her lust for revenge. But before she would go on a rampage and make name for herself, she had to ask one more question. "When will you collect your debt?" she asked the demon.
"Now" said the demon before slashing her with its massive tail. She flew in the air and then felt her hair being grabbed by its hands. Her head was then rotated towards where she was, or still was. She saw her headless body stumbling back from the blow and trying to not fall on her back before regaining balance and standing upright. She flexed her fists and then shoot lightning bold from her palm. The demon watched her body shoot another bold before interrupting her "I collected my side of the deal, you can go", and then vanishing with her disappointed head into putrid black smoke of ash and rotten eggs. Her body didn't hesitate and went on to quench her strong lust. Lust for revenge, lust for power, and the other kind of lust.
With no brain to think with, the now headless witch flies around her territories on her broom and with nothing but her trusty cape, purple stockings, heels and evil pumpkin face wearing her old hat. She might have no thoughts, but her heart still lusts for being not just the strongest and most evil witch in the world, but also the hottest witch in the world.