Out of the Iron Labyrinth

Out of the Iron Labyrinth is a hell-escape adventure for one character designed for Old-School Essentials. Whether they were kidnapped by a cult, traded to a demon by an evil wizard, or accidentally banished by an errant spell, the character must navigate the Court of Yllthrax, one corner of the infinite Iron Labyrinth, in order to find a way back to the Material Plane.

Designed for one level 4-6 character, Out of the Iron Labyrinth can be played with a GM or as a solo adventure using the included solo tools. Perfect as a self-contained module or as a side adventure when the party in your campaign gets split up (or when only one player can make it to game night).

Adventure Includes:

• A multilevel dungeon: The Court of Yllthrax is one corner of the Iron Labyrinth, ruled by the black dragon Yllthrax and populated by the damned souls under his dominion.
  
• Powerful NPCs: Possible enemies and allies, including
  • Yllthrax, a black dragon who has sworn allegiance to the demon lord Bethgor, ruler of this plane.
  • Nyulura, an erinyes and Yllthrax's lieutenant.
  • Grrz, a chain devil who lost his chains after a failed incursion onto the Material Plane and now wants to usurp Nyulura's position.
  • Haiayel, an imprisoned angel that wants to be released from this hell.
    
• A host of creatures: Demonic and otherwise, to talk to, hide from, bargain with, or fight.
  
• Multiple hooks and exits: There are several ways to pull a character into this module, and just as many ways for them to extricate themselves from it.
  
• Special rules for respawning when you hit 0 HP: You're already in hell...this place won't let you just die!
• Solo tools: We are including a solo play framework with a core gameplay loop and oracle tables to facilitate GM-less play.

Out of the Iron Labyrinth was created for Old-School Essentials Month 2026 on BackerKit. A special thank you to the 365 backers that made this game a reality.

• Writing and Layout by M. Allen Hall
• Art and Cartography by Jamie Douglas
• Cover by Erek Jones

Old-School Essentials is a trademark of Necrotic Gnome. The trademark and Old-School Essentials logo are used with permission of Necrotic Gnome, under license. Play requires Old-School Essentials.