Have What You Need

Expedition

You packed it before you knew you'd need it — turns out you did.

When you decide that you had something all along, transfer a mark (or marks) from your "undefined" inventory to a specific item or a slot. If you mark a slot, fill it with a common mundane item or something from your personal possessions.

Alternately, you can expend a use of supplies to mark an additional small item/slot.

Whatever you produce, it must be something you could have had all along. The GM or any player can veto unreasonable items.