In your inventory you will have 2 fairies. 1 Sage and 1 Demon Choose
1 and open it.
You will learn ALL skills of the fairy you opened.
After doing that, open the 2nd fairy.
Do the same as you did with the 1st one you opened.
After completing both steps, Log off game, then back on.
At this point you will now have both sage and demon skills.

Enjoy!