How to do Transfer Enhancement:


 
Place the new equipment with a higher grade into the top slot then place the equipment that has been enhanced to the bottom slot
Press the transfer button to move the enhancement process to the new equipment
Equipment that becomes sacrificial will be lost
Equipment that has +4 or more enhancements cannot be used as material transfer
Cron Stone

Cron Stone helps to increase the amount of EXP from enhancement to the material you want to transfer. For example, to transfer to gear with Epic grade, you need a lot of EXP so that the level of enhancement is higher. You can buy Cron Stone from Pearl Shop or get it for free through Event.
#Enchance:
Weapon & Armor Enhancements

The Enhancement process for Weapon and Armor requires a special stone called Blacktone. Blackstone types are divided into 4 categories, namely Poor, Fair, Good and Grand. Poor Blackstone has the lowest percent enhancement while Grand Blackstone has the highest percent enhancement.

The chance of forging Weapon or Armor equipment depends on the number and quality of Blackstone used to forge. The better the quality of Blackstone, the less amount of Blackstone is needed. Sometimes an 80% or 90% chance can make the enhancement process fail. If you want to take the safe path, increase the odds to 100%.


If you leave the window after entering Blackstone without pressing the Enhance button then the Blackstone that has been used cannot be returned. To cancel using Blackstone, press the minus ‘-‘ button at the top of the percent number.


 
Restore


If you fail to do the enhancement process, you can restore some of the enhancement opportunities that have been entered by using the Silver or Restoration Scroll items that are sold exclusively through Pearl Shop or you can get them from the Event. Items like Memory Fragment can also be used and will restore a much greater chance of enhancement.

but if it has reached + 15-20 is very difficult and requires a lot of material Tips that I suggest right if doing enchance fill the material up to 10% only this way is very effective to save material and your silver