{
  "parent": "twilightforest:alt/root",
  "criteria": {
    "crumble_horn": { "trigger": "minecraft:inventory_changed", "conditions": { "items": [{ "item": "twilightforest:crumble_horn"                }]}},
    "used"        : { "trigger": "twilightforest:has_advancement", "conditions": { "advancement": "twilightforest:alt/treasures/crumble_horn_used" }}
  },
  "requirements": [
    [ "crumble_horn", "used" ]
  ]
}