Buildings/Blacksmith/Combining Materials


 * 1) Materials needed to forge equipment have 5 levels in total: normal, advanced, elite, epic and legendary
 * 2) Four identical material (same type, same quality) can be combined to make a higher-quality material. For example, 4 normal feathers can be combined to create an advanced feather.
 * 3) The top material quality is legendary. The higher the material quality, the better items it can be used to forge.