Hydra

{
  "data": {
    "id": "crd_01m66p61m8ycgfwv4mbrcaxn9k",
    "number": "OP02-090",
    "category": "event",
    "colors": ["purple"],
    "cost": 1,
    "life": null,
    "power": null,
    "counter": null,
    "attributes": [],
    "block_icon": "1",
    "localizations": {
      "en": {
        "name": "Hydra",
        "types": ["Impel Down"],
        "effect": "[Main] DON!! −1 (You may return the specified number of DON!! cards from your field to your DON!! deck.): Give up to 1 of your opponent's Characters −3000 power during this turn.",
        "trigger": "[Trigger] If your opponent has 6 or more DON!! cards on their field, your opponent returns 1 DON!! card from their field to their DON!! deck."
      }
    }
  }
}