[
  {
    "id": "standard_pack",
    "name": "Standard Pack",
    "cost": 500,
    "cardCount": 3,
    "dropRates": {
      "common": 0.60,
      "rare": 0.30,
      "epic": 0.08,
      "legendary": 0.02
    },
    "cardPool": ["imperial", "raider"],
    "description": "A standard booster pack containing cards from both factions.",
    "artKey": "pack_standard"
  }
]