Set Boxes are convenient ways to save up on space by combining an entire Equipment Set into a box. When each piece of the set is in a player's inventory, they are able to Merge the set. An example of this is Azael's First Twin Dagger and Azael's Second Twin Dagger being in the inventory allows the player to Merge them into Azael's Twin Daggers Set Box. Every Equipment Set can be Merged into a Set Box.