Beach sand can also be converted directly into mystery boxes (without progressing the event) at a cost of 375 per event mystery box or 750 per big event mystery box. Beach sand can be stored in the currency pouch to save bank and inventory space. When handing them in to Reyna, the collected sand is taken directly from there instead of from the inventory. After the event ended, players with beach sand remaining saw the following message upon logging in: You have until the 3rd of August to use your beach sand before it disappears!