Yamatagi-Madara of the Accursed Land (S01E01)

Deep in the wilderness of a remote mountain range, an unexplained presence lurks—something the villagers have long been cautioned to avoid at all costs. No one speaks of it openly, but the warnings are clear: stay away from the high peaks, especially after dark. Those who have ventured too close rarely return, and the few who do come back changed, haunted by what they witnessed. The mountain holds a secret older than memory, and it does not welcome intruders.