[Event] Old Moon Fence

- Description: A fence made from tightly woven wood developed over several years by the Old Moon Guild. Can efficiently hold up to ten grid slots. Use it on a field to install it. This fence does not count towards the total number of installed fences. ※ This fence will be removed once the event ends, including any installed fences.

- Additional use requirements are not yet decoded; this is not a complete eligibility check.