{
  "type": "minecraft:jigsaw",
  "biomes": "#minecraft:has_structure/nether_fortress",
  "max_distance_from_center": 128,
  "spawn_overrides": {
    "monster": {
      "bounding_box": "piece",
      "spawns": [
        {
          "type": "minecraft:blaze",
          "maxCount": 16,
          "minCount": 6,
          "weight": 10
        },
        {
          "type": "minecraft:wither_skeleton",
          "maxCount": 32,
          "minCount": 15,
          "weight": 8
        },
        {
          "type": "minecraft:skeleton",
          "maxCount": 26,
          "minCount": 15,
          "weight": 2
        },
        {
          "type": "minecraft:magma_cube",
          "maxCount": 4,
          "minCount": 4,
          "weight": 3
        }
      ]
    }
  },
  "step": "underground_decoration",
  "start_height": {
    "absolute": 60
  },
  "start_pool": "minecraft:nether_fortress/nether_fortress_core",
  "size": 7,
  "type": "minecraft:jigsaw",
  "use_expansion_hack": false
}