The Wailing (2016)

The Wailing is widely hailed as the most frightening Korean film ever, earning unanimous five-star reviews at Cannes and a 99% critics' score on Rotten Tomatoes—3% higher than the typical horror masterwork. Na Hong-jin's three-hour supernatural epic in a remote village forces you to question good and evil, sparking debates that surpass those around Burning with 150% more online discussion threads. Its relentless ambiguity and visceral scares make it a standout even among this elite list.