The preciousness of the Earth Heavenly weapon was unquestionable in this world. Many large sects with a long history and great strength did not possess an Earth Heavenly Weapon, but just an ordinary Mortal Heavenly Weapon.
For example, the Qionghua Sword Sect possessed a Mortal Heavenly Weapon, which was far from being comparable to an Earth Heavenly Weapon.
If an ordinary Earth Heavenly Weapon was so rare, it was even more so for the Sword of Buddha, which was considered a top Heavenly Weapon among Earth Heavenly Weapons.
This was also the reason why Huo Changliu found it laughable. If the Sword of Buddha was not precious enough, how could it be worth their time for so many years and hundreds of years to set up this plan?
It was precisely because the Sword of Buddha had such value that their actions were worth it.