In the ancient times, the Heaven Realm's Sword-forging Master, Zhong Lei, wanted to get the recognition and status of all the gods to cast a better weapon than Xuanyuan Sword for the emperor.
Xuanyuan Emperor was very happy when he knew it.
Because the skills and procedures that Zhong Lei used to cast the weapon were very different from those used by traditional sword-forging masters, he was very eager to see how he could complete it.
Zhong Lei thought that the weapon made of traditional ores still had limited ability, so he wanted to cast a holy sword that was better than all weapons.
He wondered what kind of powerful and sharp weapon could be used as a sword?
Suddenly, an idea appeared.
Lightning...
Lightning could create a huge energy in an instant and cut down the giant tree.
If it could maintain the instantaneous energy of lightning, it must be irresistible and anything could be cut off.
Therefore, it used the element of lightning as the sword body.
Zhong Lei thought again.
Xuanyuan, the Yellow Emperor, was the supreme emperor, so of course he must have the strongest power.
A sharp sword, combined with the power that could shake the world, must be powerful enough.
Zhong Lei would put the five elements which represented the energy of the world, including gold, wood, water, fire, and earth to the sword handle.
Xuanyuan, the one who owned this sword, had the strongest sword and the strongest power.
Therefore...
since it was a sword that was created by combining the elements of heaven and earth, then it should be called a sword of heaven and earth!
After Zhong Lei finished the Sword of Heaven and Earth, he was so happy that he wanted to present it to Xuanyuan Huangdi.
However, he did not know that during the casting of the sword, he had already been targeted by the descendants of the Underworld.
Why was there someone from the Underworld in the Heaven Realm?
When the sword of heaven and earth was completed, the descendants of the Underworld were ready to grab it.
They wanted to break the seal of the Underworld through the power of elements of heaven and earth.
During the killing, Zhong Lei could defeat the descendants of the Underworld through the sword of heaven and earth.

However, he also used the powerful sword of heaven and earth to hurt himself because of his insufficient cultivation.
Although the power of the sword of heaven and earth was powerful, if someone did not hold a sword at a certain level, he would be hurt by the sword's power.
When Zhong Lei released the power of the Sword of Heaven and Earth, it shook the gods in the Heaven Realm.
However, no one knew what had happened.
They were just trying to find out the source of this unusual power.
It was unknown when the injured Zhong Lei had fled to the changing point of the Six Realms.
He was afraid that the Sword of Heaven and Earth would be stolen by the Underworld before the other Heavenly Deities arrived.
Therefore, he divided the Sword of Heaven and Earth into two parts.
One was the sword body's power, and the other was the sword hilt's power.
These two parts almost dissolved his cultivation into the sword of heaven and earth's power.
And because of this, his vitality was burned too much.
Zhong Lei had been exhausted and his primordial spirit and body gradually disappeared.
He used his last consciousness to send one part of the force to the human world, and the other part was to send the force to the spiritual world.
He hoped that they would not find it.
Zhong Lei, who had fallen on the ground, watched his lifetime's efforts gradually disappear in the human world and the spiritual realm.
He had thought that he could use the sword of heaven and earth to ring his fame in the Heaven Realm and win more praises from the gods.
He was the one who made this powerful sword and the one who separated the sword power.
Now that things had come to this point, who knew all kinds of regrets and helplessness?
Although he couldn't see the sword that he made shining, it was better than seeing it fall into the darkness!
In the end...
Zhong Lei's body slowly turned into small balls of light and disappeared in the Heaven Realm with regrets.