Nightmare Express

Nightmare Express appears in Dungeon Crawler Carl.

Nightmare Express debuts in book 3 of the Dungeon Crawler Carl series as an enigmatic train-like entity within the anarchist's cookbook floor. With no further appearances documented across later books, it remains a singular, underexplored element of the dungeon's chaotic infrastructure. Its presence underscores the escalating surreal horrors Carl and his companions encounter, setting a tone for future locomotive-themed perils that never fully materialize.