The Sword Loki (RUNE 2)

After playing a few hours, I realized that without a sword, Loki, you can play forever and no result...
After a victory over Loki, I have accumulated a few boards with the recipe for the sword of Loki.
There is a hint:
Learn the recipe with the help of a mystical stone!
The stone can be dismantled, then the recipe will become the.
Where can you find this mystical stone and how to work with it?
Where and how to disassemble weapons and armor, I only know how to throw them away or put into the chest?!
And is it possible, and how to choose another job, in the menu, a lot of them, or just:
Get 4 artifact?