drops:
  - item_id: credits
    weight: 50
    quantity: 200
  - item_id: credits
    weight: 30
    quantity: 500
  - item_id: credits
    weight: 15
    quantity: 1000
  - item_id: credits
    weight: 4
    quantity: 3000
  - item_id: credits
    weight: 1
    quantity: 10000