Eyon Faeng (concept)
Eyon Faeng, or 'Whispering Wind' in the ruling language of Kathun-Kai, is a legendary sword and perhaps the most well-known Kathuni fable, bastardized tales of the sword and its history reaching as far as Chevalie even before the people of The Continent made contact with the far-east. Despite its legendary status across the world, however, it was lost some time before the 4th century and never recovered or seen again. The last known wielder of the blade was the Kathuni First Master of the First Banner to the Emperor, Xaoi Yaung Zayang, who led nearly 100,000 men into battle in the Khayar Seldnii Darn against the Öltenic warlord Otached and wielder of the eequally famous blade Iorne Seld.
The blade itself is said to have been as thin as paper, but was impervious to so much as a scratch and gave its wielder the ability to swing far faster than any human should be capable of. Not only that, but many legends refer to it 'cutting the air itself'. While recorded many times in the Kathuni bureaucratic record, the actual result or veracity of this is unncertain. Almost all tales of the blade doing so refer to it as tearing through vision itself, leaving horrifying black voids in reality and tearing down the walls of castles and cities before it.
The sword was originally claimed to have been the fifth blade of the first Empress of Kathun-Kai, Dragon Empress Yao Ren Cai-Tiayang, and was gifted to her legendary bodyguard (and founding First Master of the First Banner to the Emperor) Gaorun Mayng who would then pass it down to each successive First Master. Xaoi Yaung Zayang, after his stalemate with Otached, disappeared after the devastation of the battle. While unproven, tales say he became a Xaouxae (a traveling swordsman) after abandoning the Emperor's service in shame. Regardless, with Yaung Zayang's disappearance from the historical record, Whispering Wind too was never seen again.