{
  "type": "lucky:group",
  "luck": -2,
  "outcomes": [
    {
      "type": "lucky:difficulty",
      "difficulty": "hard"
    },
    {
      "type": "lucky:entity",
      "entity_type": "minecraft:creeper"
    },
    {
      "type": "lucky:entity",
      "entity_type": "minecraft:lightning_bolt"
    }
  ]
}