Some of the equipments can be strengthened, which show as follows:
You can put the equipment and the relating material into the forging furnace, and then click the “refine”.
The other item in the picture above is called “Wind Stone Fragments”.
The strengthened materials can be got from the material shop or winnin the battle outside. You can also buy it in the mall.
There are three kinds of strengthen materials: weapon material, armor material and general material. For example, wind stone fragment is a kind of general material.
“Level Required” means you should reach the necessary level to use this material.
The blue words just like “attack + 2″ means that one you use it to strengthen your weapon, it will effect your weapon as it shows.