When Gwok Jing and Wong Yung forged the Heaven Sword and Dragon Sabre in their final days, they did not make it public knowledge that they were forging the weapons or why. That information was known to a privileged few: namely, their children Gwok Seung and Gwok Por Lo. Anybody else who found the weapons would recognize that they were extraordinary weapons (extremely high quality, with unmatchable sharpness and weight), but not "magical" in any way.
And yet, in the time of HEAVEN SWORD & DRAGON SABRE, all of wulin became obssessed with the weapons because of the following words:
The Icon of Wulin
The Treasured Sabre Dragonslayer
Commands The World
None Dare Disobey.
If The Heaven Sword Does Not Emerge,
What Can Challenge For The Peak?
How did the rumor that the Heaven Sword and Dragon Sabre held vital secrets start?