Progressive Loot Tables

iron_ore.json

{
  "type": "minecraft:block",
  "pools": [
    {
      "rolls": 1,
      "entries": [
        {
          "type": "minecraft:alternatives",
          "children": [
            {
              "type": "minecraft:item",
              "conditions": [
                {
                  "condition": "minecraft:entity_scores",
                  "scores": {
                    "miner": 3.0
                  },
                  "entity": "this"
                }
              ],
              "name": "minecraft:iron_block"
            },
            {
              "type": "minecraft:item",
              "conditions": [
                {
                  "condition": "minecraft:entity_scores",
                  "scores": {
                    "miner": 2.0
                  },
                  "entity": "this"
                }
              ],
              "name": "minecraft:iron_ingot"
            },
            {
              "type": "minecraft:item",
              "conditions": [
                {
                  "condition": "minecraft:entity_scores",
                  "scores": {
                    "miner": 1.0
                  },
                  "entity": "this"
                }
              ],
              "name": "minecraft:iron_nugget"
            },
            {
              "type": "minecraft:item",
              "name": "minecraft:cobblestone"
            }
          ]
        }
      ],
      "conditions": [
        {
          "condition": "minecraft:survives_explosion"
        }
      ]
    }
  ]
}