In many cultures, shadows are believed to be connected to the soul. If your shadow is misbehaving, it's possible you've picked up some negative energy. Try some cleansing rituals - sage, salt, and symbols of protection like talismans or amulets.
You're living a horror writer's dream, my friend! But on a serious note, it might be time to sage the house and look into the history of that doll. There’s something deeply unsettling about objects from the past manifesting behaviors like that. Do you ever feel a presence or just …