C4164 Tempering the Heaven Slaughter Sword!

Buzz, buzz, buzz.

The Heaven Slaughter Sword vibrated in front of Gu Xuan.

It had followed Gu Xuan for so many years, and its strength had always been improving. The Sword Blade had also been transforming.

Now, although it was only a Quasi Immortal Weapon, in terms of hardness, it was on par with ordinary Immortal Weapons.

With Gu Xuan's blessing