drops:
  - item_id: credits
    weight: 40
    quantity: 15
  - item_id: credits
    weight: 30
    quantity: 30
  - item_id: credits
    weight: 20
    quantity: 50
  - item_id: credits
    weight: 8
    quantity: 100
  - item_id: credits
    weight: 2
    quantity: 250