This sounds really unique, Tony Sarrecchia. I haven't heard of, or read, a script like this.

I think the logline needs some work. Here's a suggestion: "After a gift unleashes malevolent energies on the guests at a White Elephant Christmas party, a ________ (the protagonist with an adjective) and her _______ (adjective) brother fight the ____________ (another word for energies) in order to survive (or whatever the stakes are)."

I'm not sure where "eldritch horror prowls nearby" would fit in the logline (or if you need it).

Thanks for your feedback!

You're welcome, Tony Sarrecchia.