If you loved Book of Shadows: Blair Witch 2, try Belphegor, Phantom of the Louvre
A bridge between a film you've already seen and one most people haven't. Belphegor, Phantom of the Louvre has roughly 3.8× fewer votes than Book of Shadows: Blair Witch 2 — it's a deeper cut, not a mainstream recommendation. Here's what they share, and what the second one does that the first one doesn't.
What they share
Theysit in Horror / Mystery territory. If that's the register that drew you to Book of Shadows: Blair Witch 2, the second film will land in a comparable space — through a different lens.
What Belphegor, Phantom of the Louvre is
Louvre Museum. Midnight. A stray beam of light. A mischievous spirit is freed from its ancient sarcophagus, possessing a woman and terrorizing the museum. Soon an electrician and a young student investigate. French cinema does love its phantoms.

