This is a sword that has 2 blades(called prongs) instead of a single one. They are sharpened such a way that for physical combat they are used by thrusting. There is a slot above the hilt of the sword where a gem can be slotted in for casting Ŝanĝi Lokon. The two prongs of the sword can resonate with the frequency of the gem slotted to make casting easier and more powerful. Meanwhile the ends of the prongs are sharpened making it a formidable weapon for stabbing. By combining these two capabilities allow it for a unique fighting style.
Popularity and Usage
An old style of sword that was developed for use in the Great War. To enable front line soldiers to easily cast spells while still wielding a sword this special design had to be made. This was a fairly popular and effective weapon at the time, taking their opponents by surprise. Being able to use elemental attacks woven into physical ones evoked a new era of combat.
Despite all these advantages the sword wasn't without its drawbacks. It was very heavy and unwieldy to use. The design of the prongs so that they could be used for casting Ŝanĝi Lokon with the tech at the time meant the blades couldn't be sharpened anywhere but the point. Otherwise the casting wouldn't work properly. This meant the sword could only be use for thrusting. Another drawback is that the gems slotted into the swords would get extremely hot, sometimes even getting so hot that the cross guard would glow orange.
These drawback and others means that this weapon is treated more like relic, or an outdated weapon. Not many use it as more modern weapons outclass it. Its is kept usually as a novelty, sometimes kept by collectors, or used for historic reenactments.
Shortly after the evident success of the tuning sword, a two handed lance version with a longer hilt was introduced. This was so that aggressive magic users could be more mobile and push an advantage easier. This was also proven to be very successful and won many battles.
A modern pure spell casting tool that was built on tuning sword theory but miniaturised. Small and unsharpened it is no longer a physical weapon, but modern technology allowed it to many times smaller so that it could be held in one hand while still having superior spell casting power.