Flags:                  Item flags. (Default: null)
#     DropEffect            If the item has a special effect when on the ground. (Default: None)

I do not understand the use.
Please write an example.
Thanks for helping.

- Id: 4001

    AegisName: Poring_Card

    Name: Poring Card

    Type: Card

    Buy: 20

    Weight: 10

    Locations:

      Armor: true

    Flags:

      BuyingStore: true

      DropEffect: PURPLE_PILLAR

    Script: |

      bonus bLuk,2; bonus bFlee2,1;