Technology: Caster Shells

 Caster shells are the accompanying technology that go along with caster guns. The shell provide the actual energy that is released by the gun. Various types of shells exist, all of which release a different type of energy. Caster shells are extremely rare to find in modern times as they are part of what's considered antiquated technology (You can have them custom made though). However, caster shell energy is so different from that of tao magic, that the two render each other completely null and void.