This is just an basic guide for Rune insert and upgrade.
First of all the NPC location
To start upgrade Rune
Insert 5x same color Lv 1 Rune in order to upgrade to a Lv 2 Rune and prepare the amount of gold coins required
And the result will be as follow
Now move to next Lv do as previous insert 5x Lv 2 Rune in order to produce a Lv 3 Rune
From Lv 3 Rune to Lv 4 Rune will have no type (Class) or color restriction, any 5x of same Lv may produce a higher Lv of Rune.
Now let take a close look of the Lv 3 Rune
Be reminded the result of Class and talent is random.
Next what you can do with your Rune
Have a nice day dear member and enjoy ^^