Alchemist will tell you that have to collect 10 Dragon Shards and bring them back to him.
After you collect 10 Dragon Shards, return to the Alchemist. He will give you a Cor Draconis. From this moment you will have the Dragon Stone Alchemy and the ability to create Cor without returning to the Alchemist.
You can upgrade your Dragon Stone at the Alchemist.
There are 3 kind of upgrades:
• Class
• Clarity
• Level
The Class raise the intensity and the number of bonus. The Class are, Rough, Cut, Rare, Ancient and Legendary.
To upgrade the class you must socket 5 stones of the same type and press Refine