{
  "type": "tconstruct:modifier",
  "allow_crystal": true,
  "inputs": [
   
     {
      "tag": "minecraft:music_discs"
    },
      {
      "tag": "minecraft:music_discs"
    },
    {
      "tag": "minecraft:music_discs"
    }
  ],
  "level": 1,
  "result": "tconstruct:harmonious",
  "tools": {
    "tag": "tconstruct:modifiable/bonus_slots"
  }
}