Tsukimichi - Volume 16 (Light Novel‪)‬

The Kuzunoha Company accepts a request from one of Limia Kingdom's great noble houses to investigate Night Frontal, a barren marshland where the spirits have mysteriously vanished.
No sooner do they begin their survey than they are caught in a series of inexplicable phenomena. Before they can react, their entire base camp is transported deep into the heart of the swamp.
As panic spreads among the investigators, Makoto remains calm. Summoning powerful earth and fire spirits, he secures their cooperation and sets out to uncover the truth behind the cursed land.
Their destination is a colossal tree believed to be responsible for devouring the spirits and bringing ruin to the marsh.
To free a land abandoned by spirits, Makoto and his companions must confront a mystery far older—and unexpected.