I hope there's plenty of time before your next costume party, so you can order magical props and decor like this animated spellbook with a moving quill that appears to magically write spells all on its own.
The real magic behind this fun prop is a set of three AAA batteries and a clever hidden magnetic track that holds the quill upright and makes it move as if it's transcribing some ancient verse.
The prop also glows from within, and emits spooky sounds that add to the supernatural effect. Just tell your party guests you found it at the back of that creepy bodega on Dover Street that no one ever goes into, and that it definitely wasn't purchased online for $48. Warn them that if they don't bring their empty cups back to the kitchen, there's no telling what revenge spell the tome might enact.