Meta-gaming : extreme edition. Anyway, how is the dagger supposed to work in a world where nullomancy is the only form of magic. Or the siren call for that matter. I don't see how a crystal could be made to gain the ability to capture a soul. Is it bathed in a tank that has been filled with the abstract concept of capturing someone's soul? Does the siren get its power from having a crystal charged with the Element of "telling people what to do". Can I charge a crystal with the abstract notion of "Helplessness in facing the inherent finiteness of life."? How do I submerge a crystal in "Helplessness in facing the inherent finiteness of life."? P.S. : The part about the largest contact surface means crystals cannot be filled with any type of mix. If you use steel, iron will be stored. If you use bronze then copper. If you use any liquid with a water base (acid, poison) the only thing stored will be water. If you want to store oil, only the most common of the components of that oil will be stored.