Chess Board with Secret Box Opened with Keys 😮

This man has designed a very interesting chess board for storing valuables. There are many key entries on the board and you need to place the keys in the right places to open the box. You will be surprised to see what is inside the box. After placing the keys one by one in the slots, the man managed to open the box from the middle slot with a small iron sword. Here is the item inside the box. Would you be able to open this box? 🔑🔓 (cred: luckyroosterco on IG)