Gao Xuan has been in the Cyan Celestial Realm for less than a hundred years and doesn't want to move for the time being.

Although the law level of the Cyan Celestial Realm is not high, there are still many good things, such as the Five Elements Celestial Net Divine Light, Demon Ape Golden Stone, and others.

The Demon Ape's Golden Stone has an extraordinarily high quality, but unfortunately, he hasn't been able to unlock its potential.

The activation of the Thirteenth Heaven Tribulation by the Eternal Celestial Dragon Claw was unexpected for Gao Xuan.

Although he possesses the Formless Nine Revolutions, it doesn't allow for unlimited calculations and deductions.

The calculations and deductions of the Formless Nine Revolutions actually consume his Divine Soul Power. The stronger his power and the wiser he becomes, the more efficient and accurate the deductions and simulations of the Formless Nine Revolutions are.

In the Thirteenth Heaven Tribulation, due to the support of the Upper Realm Law Power, the thunder transforms into pure golden color.

The golden thunder divine light is like divine swords chopping down, sweeping away overwhelming might far exceeding the total power of the previous twelve layers of thunder light.

"Is this the Taiyi Celestial Thunder?"

Gao Xuan slightly squinted his eyes; the intensity of the tribulation thunder was too strong to look at directly, even with the Celestial Dragon Eye.

There are countless kinds of tribulation thunders with endless changes. The history of cultivators crossing the tribulation in the Immortal Realm is long, and they have summarized many types of tribulation thunders.

The four major Human Immortals of the Daoist Sect are not foolish. Except for the Celestial Fool, the other three, although they did not visit in person, sent heavy gifts to Gao Xuan.

The various texts and secret techniques within their sects were copied and sent in their entirety.

Even the rest of the Buddhist Arhats from the Buddhist Sect consciously came to give gifts, inevitably offering various texts and secret techniques.

Gao Xuan, having secluded himself for nearly a hundred years, read through all these texts during his leisure time.

Adding the memories of many powerful individuals absorbed by the Eternal Celestial Dragon Claw, Gao Xuan has a good understanding of tribulations.

Among all tribulation thunders, the Taiyi Celestial Thunder ranks in the top ten.

With countless types of tribulation thunders, even Celestial Immortals crossing tribulations may not encounter the Taiyi Celestial Thunder.

According to records, the Taiyi Celestial Thunder is grand and magnificent, containing the Path of Innate Taiyi, a wondrous spectacle.

Cultivators encountering the Taiyi Celestial Thunder are almost destined to die.

Ao Yi and Gui San, who were observing the spectacle from the side, also realized something was amiss. Both squinted their eyes, staring intently at the golden tribulation thunder above.

"Taiyi Celestial Thunder, how is this possible?"

Gui San muttered, with red tears flowing uncontrollably. Just a few glances caused his eyes to start bleeding.

Gui San dared not look any longer. He closed his eyes and said, "No doubt, it must be the Taiyi Celestial Thunder, Gao Xuan is doomed!"

Ao Yi also closed his eyes, not daring to look, nodding vigorously, "No doubt, it's the Taiyi Celestial Thunder. We should immediately dive deeper."

The endless seawater is the best barrier. Even the strongest thunder is hard-pressed to reach the deep, endless sea.

Ao Yi and Gui San are not top-tier masters, but their divine techniques in water are very potent.

The two quickly dove hundreds of miles underwater.

In this place, the seawater is as dark as ink, with only some glowing giant sea fish swimming back and forth.

These sea fish have flat bodies, many limp claws, and look somewhat like octopuses.

At this moment, these giant monsters also sensed the aura of the tribulation thunder and appeared quite agitated.

Ao Yi and Gui San ignored the giant monsters, for though they are filled with essence blood, their intelligence is low.

The Dragon Palace used to send navy forces to catch these giant monsters for food. Though not tasty, they are exceedingly nourishing due to the dense essence blood.

In this position, surrounded by deep layers of water, sound and light cannot penetrate through, and even different types of Primordial Qi are filtered by the seawater.

The water at this depth contains only the purest and strongest Water Element Primordial Qi.

For Ao Yi and Gui San, lingering in such deep water makes them feel very safe.

Even so, the golden thunder divine light from above still penetrated through layers of seawater, projecting divine light into the deep sea zone.

The shimmering deep-sea area under the golden light, due to the natural circulation and flow of seawater, rippled continuously, giving the deep sea a kind of extraordinary beauty.

Through several hundred miles of deep seawater, Ao Yi and Gui San finally dared to look up at the thunder light above.

"He's dead for sure!"

Ao Yi said happily, "No matter what abilities he has, encountering the Taiyi Celestial Thunder means certain death."

Gui San was not so optimistic; he hesitated and said, "What if he doesn't die?"

"Even if he survives, all the better; I'll kill him myself. Just in time to avenge my father!"

Ao Yi originally had no particular obsession with revenge, but seeing the Taiyi Celestial Thunder descend, he became excited.

This is a once-in-a-million-years opportunity for revenge. How can he miss it?

Ao Yi suddenly felt the celestial mandate was on him; with such great fortune, what could he not accomplish?

Gui San, however, was somewhat hesitant, not considering this a good opportunity.

The activation of the Taiyi Celestial Thunder likely indicates that Gao Xuan's power is too strong!

Just as Gui San was about to speak, a golden thunder light, like a divine sword, pierced through hundreds of miles of seawater.

Countless seawater instantly vaporized, and the steam diffusion made the golden thunder light appear even more ethereal.

Countless giant monsters, unable to evade in time, were struck by the golden thunder light, vaporizing on the spot.

Gui San and Ao Yi were terrified; although these monsters appeared clumsy, they were thick-skinned and tough. It would take a while to completely kill them even if they used all their strength.

The Taiyi Celestial Thunderlight that fell into the seawater was actually shattered thunder light.

It is evident that the power of the Taiyi Celestial Thunder is extraordinarily terrifying.