{
  "format_version": "1.8.0",
  "minecraft:spawn_rules": {
    "description": {
      "identifier": "minecraft:sulfur_cube",
      "population_control": "monster"
    },
    "conditions": [
      {
        "minecraft:spawns_underground": {},
        "minecraft:difficulty_filter": {
          "min": "peaceful",
          "max": "hard"
        },
        "minecraft:weight": {
          "default": 200
        },
        "minecraft:herd": {
          "min_size": 4,
          "max_size": 4
        },
        "minecraft:biome_filter": [
          {
            "test": "has_biome_tag", "value": "sulfur_caves"
          }
        ]
      }
    ]
  }
}