I've heard that local blacksmith have mastered the technique of Soul Crystal extraction.
I was very interested, so I started my own research. Finally I learned how to change one crystal soul for another and then to seal them.
At the end, I put sealed Soul Crystals in a special box. If you want, I can exchange your Soul Crystal for a Box containing a different Soul Crystal. If you wish, you can bring back the old soul. If you are lucky enough, of course.
I can pack Soul Crystals of Lv. 5-8 into the box.
What do you think? Are you interested?