If you loved The Priests, try Svaha: The Sixth Finger
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Jang Jae-hyun, and they both carry the dread, foreign gem, slow burn mood tags, and they sit in Horror / Mystery / Thriller territory. If that's the register that drew you to The Priests, the second film will land in a comparable space — through a different lens.
dreadforeign gemslow burn
What Svaha: The Sixth Finger is
Gangwon Province. Winter wind. A truck stop Bible. Religious debunker sniffs around a rural sect's strange origin story. What he finds: stranger things. Jang Jae-hyun's occult procedural shares DNA with both Bong Joon-ho and Kiyoshi Kurosawa.

