Blacksmith/Battle Backpack
Battle Backpack is a special Backpack that allows you to carry the Battle Equipment that you win from Dragon Tactics which, when you're rewarded a piece of Battle Equipment, you can to either click and drag or double click an item to move from the Equipment Reward window to your Battle Backpack.
However unlike the normal Backpack, Battle Backpack has limited slots. The player starts with 10 slots, 10 more slots if a Member, but along the way, the player will have to increase the number of slots due to the multiple items they will start receiving.
In order to increase the number of slots, the player can click the slot with a "+" and a pop-up window will appear asking how many slot do you want to buy. Each slot is 10 
and the player can buy up to 999 slots per window. If the player tries to click and drag or double click an item from the Equipment Rewards window to a full Battle Backpack, it will say that the inventory is full and that the player needs to either empty a slot of buy more.
