To be the best leader, you must also be the strongest leader!

On the refining platform, the largest flame vent had turned the Heaven and Earth Furnace a deep purple, and terrifying purple flames completely enveloped it.

Inside the Heaven and Earth Furnace, the Demon-Locking Tower was enveloped in extremely terrifying purple flames.

The purple flames surrounding the Demon-Sealing Tower are extremely compressed Purple Extreme Flames, whose power is even more terrifying than the Purple Extreme Flames surrounding the Heaven and Earth Furnace.

Under the burning of these purple flames, even space itself was distorted. Even a top-tier half-step demon lord level expert could not push the flames to such an extent.

However, Sun Yi and his group used the technology of the Qingyun Sect, along with the combined efforts of thousands of people, to raise the temperature inside the Heaven and Earth Furnace to a level that surpassed the limits of the mortal realm.

Only the spirit realm possesses flames of such power, but maintaining such terrifying flames is extremely difficult, so they can only be used for crafting weapons, not for fighting enemies.

The Demon-Sealing Tower floated amidst such terrifying flames, slowly rotating as dense spiritual patterns appeared on its surface. As the flames burned, the Demon-Sealing Tower was constantly changing, with various internal materials fusing together and all the spiritual patterns merging as well.

The aura emanating from the Demon-Sealing Tower was rapidly increasing, while time was slowly passing.

Sun Yi and his team have spent a long time refining this Demon-Locking Tower; they rarely spent this much time refining spiritual artifacts before.

However, compared to the time required for traditional weapon forging, Sun Yi and his team have reduced the forging time by an unknown number of times.

Suddenly, the purple flames inside the Heaven and Earth Furnace fluctuated violently, and the aura emanating from the Demon Locking Tower surged dramatically.

boom!

A terrifying aura transformed into a shockwave that swept across the surroundings, nearly blasting away the nearby flames. A ripple spread outwards through the air.

A powerful shockwave spread out from inside the Heaven and Earth Furnace, but was blocked by a powerful array set up outside.

"Quick! Seal it immediately!" Sun Yi roared, and in an instant, his most powerful aura burst forth. He then stopped controlling the spiritual fire and instead channeled his immense magical power to unleash a sealing spell on the Demon Locking Tower with both hands.

At the same time, Elder Zhang Ye and Elder Huo Ling also flew up, along with Nascent Soul stage weapon refiners such as Lei Yuandao, who surrounded the Heaven and Earth Furnace and then unleashed a series of sealing spells towards the Demon Locking Tower.

Then, mysterious runes, resembling characters, appeared before everyone, flew into the Heaven and Earth Furnace, and finally imprinted themselves on the Demon-Locking Tower.

Sun Yi and his companions worked together, continuously casting sealing spells, and it took them three days to finally cast the last sealing spell into the Demon Locking Tower.

As the final sealing technique was integrated into the Demon-Locking Tower, the tower within the Heaven and Earth Furnace began to tremble violently and emit a dazzling light, as if the power within was being revived.

"Everyone back off!"

"Activate the defensive formation at full power!"

Sun Yi stared solemnly at the Demon-Locking Tower ahead. At his command, the surrounding cultivators retreated and simultaneously activated the defensive formations to their fullest extent, pushing the barrier's defensive capabilities to their limit.

Pairs of eyes peered through the barrier at the Demon-Locking Tower inside the Heaven and Earth Furnace. The Demon-Locking Tower was still suspended inside the Heaven and Earth Furnace, its body radiating brilliant light.

Suddenly, a silver spirit rune appeared on the Demon-Sealing Tower, followed by a second silver spirit rune, then a third, a fourth...

Silver spirit patterns appeared on the Demon Locking Tower, and Sun Yi and the others watched nervously.

Although he already knew that the Demon-Locking Tower he had crafted this time had reached the level of a sixth-tier spiritual weapon, Sun Yi himself did not know exactly what quality it could achieve.

The other weapon refiners nearby watched nervously, unsure of what grade of spiritual weapon their efforts would yield.

Soon, the ninth silver spirit rune appeared on the Demon Locking Tower. Then, these nine silver spirit runes intertwined like silver spirit snakes, quickly forming a complex silver rune.

The moment the silver rune materialized, Sun Yi and the others knew that the refining process had been successful; this was a rune that only sixth-tier spiritual weapons possessed.

However, this was not the end. After this silver rune appeared, silver spirit patterns appeared again on the Demon Locking Tower.

Soon, nine more silver spirit patterns appeared on the Demon Locking Tower, and like the previous silver spirit patterns, they intertwined and combined to form a complex silver rune.

"Two runes! This is a sixth-tier, second-grade spiritual artifact!" Elder Huo Ling's eyes widened as he looked excitedly at the Demon-Locking Tower inside the Heaven and Earth Furnace, his gaze fixed on the two complex silver runes.

"We didn't expect the quality of the Demon-Locking Tower we refined this time to be even better than we anticipated. It's a sixth-tier, second-grade spiritual weapon, even better than the No. 2 Heavenly Secret we refined before!" Elder Zhang Ye looked at the Demon-Locking Tower with great excitement.

"This has exceeded our expectations, and it seems that the sixth rank, second grade is not the limit." Lei Yuandao stared at the silver runes that were still condensing on the Demon Locking Tower.

The second silver rune was formed much more slowly.

Sun Yi looked at the silver runes that were forming, his eyes flashing with excitement. He had originally planned to reduce the amount of top-tier materials and refine more Demon-Locking Towers.

However, they later obtained a large amount of top-tier materials from the demon race, so Sun Yi and his team decided to replace the slightly more ordinary materials with top-tier materials.

At the same time, the most advanced technology of Qingyun Sect was used in this Demon Locking Tower.

Moreover, Sun Yi used most of the golden spirits he had collected during this period on this Demon-Locking Tower, which is why the newly crafted Demon-Locking Tower has reached its current state.

Even so, in Sun Yi's and the others' expectations, it would have been good if this Demon Locking Tower could reach the limit of the sixth rank, first grade. They did not expect it to reach the sixth rank, second grade, and it seems that it has not yet reached the limit.

Sun Yi was well aware that each upgrade of a sixth-tier spiritual weapon represented a qualitative change, and a sixth-tier second-grade spiritual weapon was far more powerful than a sixth-tier first-grade one.

They all stared at the silver rune that was condensing. Three days later, the silver rune was finally fully condensed. However, another silver spirit pattern gradually condensed on the Demon Locking Tower.

However, the silver spirit rune was somewhat dim, and its condensation speed was much slower, as if it was very difficult to condense this spirit rune.

However, the silver spirit rune was eventually fully formed.

As the silver spirit rune fully condensed, the light of the Demon-Locking Tower suddenly receded, and the next moment, an incomparably domineering and terrifying power erupted from the center of the Demon-Locking Tower.

At the same time, a pillar of light shot into the sky, reaching a height of tens of thousands of feet. In the end, this pillar of light even broke through the Nine Heavens Gale Layer and shot into the starry sky.