The Gliding Axe was a commonly used treasure and also very easy to lose during attacks. Only a super expert could retrieve it by harnessing the axe's boomerang effect after throwing. For most people, whether they hit the enemy or not, they would essentially lose one with every throw.
In his previous life, the weapon set Xin Yun used was a nine-linked set of diamond-grade Gliding Axes; however, it lacked any activation. It included gloves, a leather pouch, and seven Gliding Axes. To assemble these items, Xin Yun had spent more than half of his wealth.
In some ways, the Gliding Axe was like a bullet, considered a consumable item, and therefore, it was mass-produced. This was only similar to how easily one could collect a fully activated suit of arrow quivers due to their large quantity.