Gui San and Ao Yi both fell silent, their eyes wide open in the deep sea.

Through layers of seawater, they could only see the golden divine thunder growing increasingly intense. The two were further astonished, wondering what skills Gao Xuan possessed to withstand the Taiyi Celestial Thunder for so long.

The two judged by their own experiences, unaware that Gao Xuan hadn't resisted at all. He simply let the Taiyi Celestial Tribulation Thunder strike him, having already put away the Celestial Sound Daoist Hat and other artifacts.

For these artifacts, such thunder was too strong and fierce, offering no maintenance or preservation benefits. Direct confrontation was feasible, but it was unnecessary.

The Taiyi Celestial Thunder posed no threat to Gao Xuan's Innate Primordial Chaos Dao Body. Mainly due to the Primordial Qi Law restrictions of the Cyan Celestial Realm, the power of the tribulation thunder was minimized, enabling Gao Xuan to cope easily.

Gao Xuan could even absorb some of the Taiyi Celestial Thunder through his body and channel it into his Celestial Dragon Eye, absorbing the Thunder Power within.

Meanwhile, he activated the Formless Nine Revolutions to analyze the Taiyi Celestial Thunder.

The strongest aspect of the Taiyi Celestial Thunder lay in the innate profound mysteriousness of thunder, vast and boundless in power, yet infinitely changing.

From Heaven's Fool, Gao Xuan learned a Thunder Skill called Celestial Capital Soundless Thunder Sword, but he never found a suitable Thunder Skill.

The Taiyi Celestial Thunder showed Gao Xuan the terrifying might of thunder.

If he were to create powerful thunder out of thin air, he certainly couldn't achieve it.

However, he could collect the Taiyi Celestial Thunder as a seed.

Then, with the Celestial Dragon Eye nurturing it, using Formless Nine Revolutions to analyze and simulate, ultimately converting the Taiyi Celestial Thunder into Thunder Skill Runes.

Through layers of transformation, finally, Gao Xuan refined his Celestial Capital Soundless Thunder Sword.

However, his Secret Technique had to be named Taiyi Celestial Capital Soundless Thunder Sword.

The key lay in the two words Taiyi, meaning Taiyi, innately born. It is the ultimate Dao of the Immortal Realm.

Of course, Gao Xuan could not fully discern the mystery of Taiyi now, but he had the seed of Taiyi Celestial Thunder, able to mimic and learn.

The power of the Taiyi Celestial Thunder was extremely tyrannical, yet its duration was very short.

In less than half an hour, the Taiyi Celestial Thunder above the Nine Heavens exhausted its power. The layered tribulation clouds began to dissipate in all directions.

In an instant, the pure and washed deep starry sky emerged.

Gao Xuan watched the slowly closing invisible spatial passage above the Nine Heavens, his heart filled with a sense of curiosity.

Uncertain about what the upper Azure Celestial Realm might be like.

According to records, the Nine Heavens Celestial Realm was similar, with the Primordial Qi Law varying slightly.

Of course, the higher the Celestial Tier, the more Divine Beings there were. The Human Race was fewer.

Upon reaching the Upper Three Realms, powerful beings were everywhere. There was no place for mortals.

Even mortals born in the Upper Three Realms would inevitably inherit abundant and powerful spiritual qi, distinctly different from ordinary mortals.

Gao Xuan found such celestial realms to be quite intriguing. Certainly, even in the Upper Three Realms, Earth Immortals were few, and Celestial Immortals were even fewer.

Now Gao Xuan aimed to quickly achieve Earth Immortal status, reaching the level of Ksitigarbha King.

So that upon encountering Ksitigarbha King again, he would at least not flee in panic.

As Gao Xuan was pondering, two dark shadows suddenly shot out from the sea surface.

One was a silver dragon shadow, another a deep green profound turtle.

The two still maintained human shape, wielding powerful magical artifacts. Behind them was the Dharma Aspect of their true form, as they aggressively charged at him.

Gao Xuan had actually noticed these two fellows long ago, just unwilling to bother with them.

After killing Ao Beiyuan and Ao Ying, the feud with the North Sea Dragon Race was considered settled. As long as other North Sea Dragons were sensible, he wouldn't go to lengths to exterminate them.

Unfortunately, these two really lacked foresight.

A slight gleam of golden light flashed deep within Gao Xuan's eyes as he unleashed the newly refined Taiyi Celestial Capital Soundless Thunder Sword.

The two rushing fellows realized there was something amiss when the Taiyi Celestial Capital Soundless Thunder Sword had already penetrated their Body-Protecting Spiritual Artifacts, striking them.

Since the Taiyi Celestial Capital Soundless Thunder Sword was called a sword, it was as if thunder was condensed into an acute Sword Light.

This strike also held the mysterious transformation of Ultimate Yang and Ultimate Yin, unpredictable and inscrutable.

Only when the Thunder Light pierced through their Protective Spiritual Artifact did the thunder light reveal itself.

Ao Yi and Gui San realized it was too late when the golden thunder light slashed at them like a sword, the sharp and fierce Thunder Light cutting their bodies apart, followed by an explosion of Thunder Power, blowing the two to pieces on the spot. 𝘧𝘳𝘦ℯ𝓌𝘦𝒷𝘯𝑜𝑣𝘦𝓁.𝒸𝘰𝓂

The shattered flesh disintegrated and carbonized in the exploding golden thunder light, turning into flying gray dust.

In the blink of an eye, two Human Immortal Level masters were obliterated.

It wasn't that Ao Yi and Gui San were too weak, but the Taiyi Celestial Capital Soundless Thunder Sword was overwhelmingly powerful.

Just speaking of its sharp and tyrannical nature, it surpassed the Hongyi Sword. Of course, the Hongyi Sword is a genuine Sword Artifact, whose sharp and profound nature is incomparable to Thunder Power turned Sword Light.

Even so, Gao Xuan was very pleased with the Taiyi Celestial Capital Soundless Thunder Sword.

Wielding a sword eventually seems a bit lower tier; directly unleashing Thunder Skill with his gaze was so graceful.

In terms of power, the upper limit of Taiyi Celestial Capital Soundless Thunder Sword was also very high. Just using a single Thunder Skill was still easily countered.

Luckily, the Thunder Sword transformed from Taiyi Celestial Thunder contained innate mystery. Very worth researching.

Gao Xuan now only grasped it preliminarily; truly refining such a Thunder Skill would be incredible.

The two killed fellows shouldn't be wasted, so Gao Xuan used the Eternal Celestial Dragon Claw to gather their Essence Blood and Divine Soul, inspecting their memory a bit, discovering these two acted on impulse without anyone behind them inciting.

Ripples hurried over, curiously asking, "Old Master, have you finished Crossing the Tribulation?"