Here's a Crafting guide for Potion and Gears Upgrade in Dragon's Call II. If you have any problem in it, just check below. Thank ZupZup who posted it on Official Forum.

You will receive scrolls from the Badge Merchants or upon completing a Heroic Instance.

These scrolls enable you to upgrade your gears or to create potion.

To upgrade your gears, you will need raw material, which are dropped when you defeat mobs in certain instances.

To autopath to the instance, first, click on your Scroll. Click Open. You will see all the necessary raw material need.

Click on each raw material, and the system will open up the instance page to indicate where these raw material are found.

Once you have collected all your necessary raw material, you can place your gears in the backpage, and combine the raw material and scroll to create a better gear.