Nightmare Express

Nightmare Express appears in Dungeon Crawler Carl.

Nightmare Express first materializes in Book 3 as a haunted, high-speed train that becomes a pivotal battleground within the Dungeon Anarchist's Cookbook. Over the course of the series, it evolves from a simple transit system into a sentient, malevolent entity that actively manipulates the crawlers' fates. Its corridors and cars become arenas for psychological warfare, forcing characters to confront their deepest fears while racing against the clock. By later books, the train's influence extends beyond its physical tracks, symbolizing the Dungeon's growing autonomy and the blurring line between environment and adversary.