See videos of Leung Ting Wing Tsun at [link]
or read commission rules at [link]
commission from IllEatYourself
It gets the name from the blue/black/silver color of its blade, which resembles the blueish spots that sometimes result in tarnished silver.
"The blade's unique ability is that its physics are REVERSED. It grows dull over time if it's left alone, but it grows sharper with use, cutting better with each strike made by the sharp edge. In other words, if you let it sit on a shelf for months, it eventually becomes no sharper than a butter knife, if it's even that sharp. If you cut things with it each day, however, depending on how much you use it, it will eventually become one of the sharpest swords in existence, able to cut cleanly through wood in one swipe and even leave small cuts in metal (although it will probably never reach a point where it can cut clean through metal). A side effect of the sword becoming sharper with use is that it never breaks"
In the middle of the 3rd era, Enhir's priests and... adventurers estabilished a certain way of enchanting. One, that was later put back on the shelf. The method was more like the expression of the artist than the creation of useful magic items. The crafters etched the knowledge of forming and reshaping of materials, so that will somehow add to any benefit on the battlefield. They tried to find out - and belived deeply - that certain bug shells can be made harder than steel (not after steel is also reinforced with magic). The result of these experiments were hundreds of scavangers hunting the wilds for creatures, and eventually lots and lots of magical trash. Most of these works - like this one - would look awkward and felt useless for the first sight. Zanahir Tetto, a gwinn craftman, who was using his own crafts in need thanked his life for the sword, because the marauders did not recognize his sword as a weapon. That later cost a head of the bandit when realized that "Ez vág..." or in Englissh "This thing cuts". Enhir's priests are hunting down trash like such, so that self-proclaimed self-confident "heroes" might not die wielding such hallmarks of history. As if a villain takes posess on one, they simply don't care.