{
  "type": "minecraft:fortress",
  "biomes": "#minecraft:has_structure/nether_fortress",
  "spawn_overrides": {
    "monster": {
      "bounding_box": "piece",
      "spawns": [
        {
          "type": "minecraft:blaze",
          "maxCount": 3,
          "minCount": 2,
          "weight": 10
        },
        {
          "type": "minecraft:zombified_piglin",
          "maxCount": 4,
          "minCount": 4,
          "weight": 5
        },
        {
          "type": "minecraft:wither_skeleton",
          "maxCount": 5,
          "minCount": 5,
          "weight": 8
        },
        {
          "type": "minecraft:skeleton",
          "maxCount": 5,
          "minCount": 5,
          "weight": 2
        },
        {
          "type": "minecraft:magma_cube",
          "maxCount": 4,
          "minCount": 4,
          "weight": 3
        }
      ]
    }
  },
  "step": "underground_decoration"
}