{
  "parent": "minecraft:adventure/root",
  "display": {
    "icon": {
      "item": "minecraft:prismarine_shard"
    },
    "title": {
      "text": "Knowledge of the Sea",
      "color": "dark_aqua",
      "bold": true
    },
    "description": {
      "text": "Defeat the Elder Guardian."
    },
    "frame": "challenge",
    "show_toast": true,
    "announce_to_chat": true,
    "hidden": false,
    "background": "minecraft:textures/block/water_still.png"
  },
  "criteria": {
    "killed_elder_guardian": {
      "trigger": "minecraft:player_killed_entity",
      "conditions": {
        "entity": {
          "type": "minecraft:elder_guardian"
        }
      }
    }
  },
  "rewards": {
    "experience": 500
  }
}