Enhancing and ranking up equipment are the best way to strength your character. You can enhance excluding of Costume items up to 30 Levels.
You can only add the same type of equipment regardless of its grade on the enhancement slot up to 10.
For example, Short-bows are used as a material for enhancing a short-bow weapon.
There are 4 different grades such as Normal, Uncommon, Rare, Hero and Legendary.
To rank up your equipment, collect two types of Rank-up Materials and place the same grade of equipment on the enhancement slots.
The number of materials for enhancing depends on the grade of equipment you enhance.
Be note that a level of your enhancement will be maintained after ranking up your equipment.