Trainyard Portal

Glowing portal to vast trainyard of engine cars fenced with zombies.

The Trainyard Portal first appears in Book 3 as a glowing gateway to a sprawling locomotive graveyard, its perimeter patrolled by undead sentries. Across the series it evolves from a simple transit point into a strategic nexus that connects multiple dungeon levels and becomes central to Carl’s growing rebellion against the Dungeon’s corporate overlords. Its significance expands as the crawlers learn to manipulate the portal network, turning the once-static yard into a dynamic battleground and eventual staging ground for large-scale sabotage.