Added

• Mega Fortress - A massive new nether fortress made up of 207 pieces and packed with loot, mobs and traps. This is our best structure yet across all Moogs structure mods! The mega fortress is made up of various towers with dungeons hidden beneath the lava. Bridges stretch out in all directions with stairs and towers leading to a second floor suspended from the roof with chains.
• Dragon Arena - A dragon skeleton sitting in lava lakes. Here you will find the most challenging mobs from the 3 new arenas and therefore, the best loot.
• Large Arena - A combat focused arena that is mostly buried beneath the surface. Here you will find plenty of spawners, vaults and trial spawners.
• Small Arena - While the easiest of the 3 arenas, don't take it lightly. There are still powerful mobs here protecting loot that's worth the visit.

Good luck!

Changed

• Now requires Moog's Structure Lib v3.0.0 or newer.

Added

• Mega Fortress - A massive new nether fortress made up of 138 pieces and packed with loot, mobs and traps. This is our best structure yet across all Moogs structure mods! The mega fortress is made up of various towers with dungeons hidden beneath the lava. Bridges stretch out in all directions with stairs and towers leading to a second floor suspended from the roof with chains.
• Dragon Arena - A dragon skeleton sitting in lava lakes. Here you will find the most challenging mobs from the 3 new arenas and therefore, the best loot.
• Large Arena - A combat focused arena that is mostly buried beneath the surface. Here you will find plenty of spawners, vaults and trial spawners.
• Small Arena - While the easiest of the 3 arenas, don't take it lightly. There are still powerful mobs here protecting loot that's worth the visit.

Good luck!

Changed

• Now requires Moog's Structure Lib v3.0.0 or newer.

Changelog

---

3.0.0-alpha.2 — 2026-06-03

Fixed

• Accept MSL alpha versions in dependency constraint. Previously MNS required MSL >=3.0.0 which rejected 3.0.0-alpha.X per semver pre-release ordering, causing a Fabric Loader incompatibility error at startup. Constraint relaxed to >=3.0.0-alpha.1.

---

[3.0.0] - 2026-05-27

Adds the Mega Fortress and requires Moog's Structure Lib 3.0.0 or newer.

Added

• Mega Fortress - a large new nether structure assembled from a jigsaw layout: roofed and roofless corridors, crossings from small up to mega, forks, corners, staircases, a raised upper level, dedicated spawner rooms, and matching dead-end caps.
• Fortress garrison - themed inhabitants including fortress guards, archers, black guards, blaze sentinels, champions, and a warden of the keep.

Changed

• Now requires Moog's Structure Lib 3.0.0 or newer.
• Structure density - merged 5 groups of variant structures into shared weighted sets, reducing overall nether structure density.

---

[2.1.0] - 2026-05-22

Fixed

• Versioned structures now have a defined path for Minecraft 26.1–26.1.2, so the game stops logging "no version mapping matched" warnings and no longer falls back to an older structure template.

---

[2.0.4] - 2026-05-06

Added

• Empty barrels in nether structures now contain loot

Fixed

• Fixed very small nether brick ruins not generating correctly due to a misconfigured template pool
• Fixed chain blocks breaking in the giant skull, large house, smoking shrine, and train on 1.21.9+ (chain was renamed to iron_chain in that update)
• Updated piglins and piglin brutes in the medium houses to use the new 1.21 item format

---

[2.0.31] - 2026-02-01

Changed

• Updated for 1.21.11

---

Changelog

---

3.0.0-alpha.2 — 2026-06-03

Fixed

• Accept MSL alpha versions in dependency constraint. Previously MNS required MSL >=3.0.0 which rejected 3.0.0-alpha.X per semver pre-release ordering, causing a Fabric Loader incompatibility error at startup. Constraint relaxed to >=3.0.0-alpha.1.

---

[3.0.0] - 2026-05-28

Adds the Mega Fortress and Large Arena, and requires Moog's Structure Lib 3.0.0 or newer.

Added

• Mega Fortress - a large new nether structure assembled from a jigsaw layout: roofed and roofless corridors, crossings from small up to mega, forks, corners, staircases, a raised upper level, dedicated spawner rooms, and matching dead-end caps.
• Large Arena - a new combat-focused nether structure with dedicated loot.
• Fortress garrison - themed inhabitants including fortress guards, archers, black guards, blaze sentinels, champions, and a warden of the keep.

Changed

• Now requires Moog's Structure Lib 3.0.0 or newer.
• Structure density - merged 5 groups of variant structures into shared weighted sets, reducing overall nether structure density.

---

[2.0.4] - 2026-05-06

Added

• Empty barrels in nether structures now contain loot
• Structures now spawn in modded nether biomes on Fabric and NeoForge.
• Added direct support for Better Nether and Incendium biomes.

Changed

• Improved terrain blending for larger structures.

Fixed

• Fixed very small nether brick ruins not generating correctly due to a misconfigured template pool.
• Replaced 1.21 blocks that don't exist in 1.20: copper trapdoors → iron trapdoors, crafter → crafting table, waxed oxidized copper bulb → shroomlight.

---

[2.0.3] - 2024-01-12

Added

• Added new structures.

  Bridges:

  • bridge_1
  • bridge_2
  • bridge_3
  • bridge_4
  • bridge_5
  • bridge_6

---

Adds the Mega Fortress and Large Arena, and requires Moog's Structure Lib 3.0.0 or newer.

Added

• Mega Fortress - a large new nether structure assembled from a jigsaw layout: roofed and roofless corridors, crossings from small up to mega, forks, corners, staircases, a raised upper level, dedicated spawner rooms, and matching dead-end caps.
• Large Arena - a new combat-focused nether structure with dedicated loot.
• Fortress garrison - themed inhabitants including fortress guards, archers, black guards, blaze sentinels, champions, and a warden of the keep.

Changed

• Now requires Moog's Structure Lib 3.0.0 or newer.
• Structure density - merged 5 groups of variant structures into shared weighted sets, reducing overall nether structure density.

Adds the Mega Fortress and requires Moog's Structure Lib 3.0.0 or newer.

Added

• Mega Fortress - a large new nether structure assembled from a jigsaw layout: roofed and roofless corridors, crossings from small up to mega, forks, corners, staircases, a raised upper level, dedicated spawner rooms, and matching dead-end caps.
• Fortress garrison - themed inhabitants including fortress guards, archers, black guards, blaze sentinels, champions, and a warden of the keep.

Changed

• Now requires Moog's Structure Lib 3.0.0 or newer.
• Structure density - merged 5 groups of variant structures into shared weighted sets, reducing overall nether structure density.

Fixed

• Versioned structures now have a defined path for Minecraft 26.1–26.1.2, so the game stops logging "no version mapping matched" warnings and no longer falls back to an older structure template.

Added

• Empty barrels in nether structures now contain loot
• Structures now spawn in modded nether biomes on Fabric and NeoForge.
• Added direct support for Better Nether and Incendium biomes.

Changed

• Improved terrain blending for larger structures.

Fixed

• Fixed very small nether brick ruins not generating correctly due to a misconfigured template pool.
• Replaced 1.21 blocks that don't exist in 1.20: copper trapdoors → iron trapdoors, crafter → crafting table, waxed oxidized copper bulb → shroomlight.