Since there was no distinction between heaven and earth in the Thunder Prison, the clouds had also changed their form, forming a huge ball that surrounded Cui Si and the Five Elements Shenzhou.

After the bonus of the Thunder Hell environment, the first wave of Heavenly Thunder was the terrifying Xuantian True Fire Thunder, which was an immortal realm spell that was even more powerful than the Nine Heavens Xuanjin Divine Fire Technique. The red thunder stretched for thousands of miles, as thick as the Yangtze River, and the number was too numerous to count, smashing from up and down, left and right, from all directions. If it was just Cui Si himself, I am afraid that this time he could take half his life.

However, in the dark, there may really be a noble person to protect Cui Si. His always hateful natal Dharma Bao Yu Pei didn't put away the Five Elements Shenzhou he was in this time, maybe he forgot it, or maybe it was because this Shenzhou had never entered the jade pendant space. In short, after the endless thunderbolts smashed down, they first hit the Five Elements Divine Boat.

This Five Elements Divine Boat is worthy of being the first Divine Boat in the cultivation realm refined with five spells, and its resistance to thunder and lightning is simply strong to the point of perversion. In fact, it can absorb lightning at all and use it to strengthen itself. As long as it doesn't exceed its limit, no amount of lightning can break it!

As a result, after so many Xuantian True Fire Thunderbolts were hit, they were suddenly absorbed by the Five Elements Divine Boat and absorbed most of the power of the Heavenly Thunder, leaving only a few left, which were transmitted to Cui Si through the Five Elements Divine Boat.

This remaining Xuantian True Fire Thunder naturally did not pose any threat to Cui Si's perverted defenses, not only did he not be able to hurt Cui Si, but he took the opportunity to inhale it into his body, refining his muscles and veins, and greatly speeding up the speed at which Cui Si fused with Chaos Immortal Qi.

In this way, not only did Cui Si escape, but he also got a blessing in disguise, and even the Five Elements Shenzhou also benefited a lot. After all, the Heavenly Tribulation that fell deliberately was much more powerful than the usual thunder tribulation in the Thunder Prison, and for the Five Elements Shenzhou, the more powerful the thunder and lightning, the more it was a favorite tonic.

This thunder tribulation lasted for ten days, and after ten days, Cui Si became a master of Mahayana and Dzogchen in one fell swoop, and the most important thing is that the five essences have not been absorbed, and there are still half of them left.

There is no way, it is really that these five elements essence is too powerful, and just one of the purest wood essences will turn the two masters of Mahayana and Great Perfection, Ice and Fire and Twin Lotus, into wasted people, and beat them back to their original form alive, not to mention the other four essences that are more powerful.

Although some of these essences will be wasted when they are burned, a large part of them will be used to change Cui Si's physique. However, there are still some parts that will improve Cui Si's strength, and these are enough for him to directly cross the threshold of the Mahayana period.

So, after this thunder tribulation, in just seven or eight days, Cui Si reached the limit of the Mahayana period and touched the last layer of the mortal diaphragm.

And this layer of diaphragm is no longer something that can be broken by ordinary understanding, and can only use the Heavenly Tribulation to help the monk break through, which is what is usually called the Heavenly Tribulation!

If this level is passed, then the monk will become an immortal and ascend to the immortal realm. If you can't pass, either your body will be shattered, the primordial gods will flee, and you will become scattered immortals, or you will be directly destroyed and turned into ashes.

For the vast majority of the monks who have crossed the tribulation, turning into ashes and destroying their bodies and spirits will be their final destination. There is only one in ten people who become scattered immortals, and as for the successful tribulation, even among the hundred monks, it is rare to see one!

Therefore, the tribulation is a very sad threshold for most monks, and they often make all kinds of preparations in advance, so as not to end up with extinction.

But this time, Cui Si was not prepared at all, and he had just become a Mahayana monk for a few days, and he had to face the most terrifying test of the Heavenly Tribulation again.

To say that Cui Si is not nervous is definitely nonsense. Others have been preparing for so long, and they have suffered heavy casualties, let alone him, an unprepared person?

However, the matter has come to this point, he is just unwilling and useless, he can only close his eyes and wait for the catastrophe to come. Fortunately, there is the Five Elements Shenzhou, and Cui Si is not completely without a chance.

As a result, in the Thunder Prison, which had just stopped for a short time, the storm broke out again, and the clouds of calamity that were several times thicker than a few days ago gathered rapidly. Then, the earth-shattering thunderstorm fell like rain.

This time the thunder tribulation was several times more terrifying than any previous one, and the thunder light was tens of thousands of miles long, densely packed, and directly engulfed the Five Elements Divine Boat.

From a distance, the three-thousand-zhang long Five Elements Divine Boat was completely wrapped in continuous powerful thunder, forming a small ball with a radius of hundreds of miles, and the thunder tribulations of different attributes were intertwined, some annihilated each other, and some strengthened each other, different entangled, just like countless naughty dragons playing, the scene was extremely spectacular.

However, Cui Si, who was in the small ball, didn't think so, the more and more terrifying thunder robbery made the Five Elements Shenzhou feel overloaded, and the absorbed thunder didn't have time to digest it. made more and more thunder energy pass through and smashed fiercely on Cui Si.

Although Cui Si's body had been tempered to an extremely terrifying level, with the strengthening of the Thunder Tribulation and the chaos of the Chaos True Fire in his body, he was also a little unbearable, and the blood vessels on his body burst out, and blood spurted out wildly, staining him into a bloody man in an instant. If the situation continues to deteriorate, Cui Si will undoubtedly die under this catastrophe.

At this critical moment, the big bell that had been making trouble for Cui Si during the Heavenly Tribulation finally stopped ignoring it, but automatically flew out, hovering over Cui Si's head, and colorful brilliance was scattered on Cui Si's body from the big bell.

Wherever the colorful brilliance went, the wounds on Cui Si's body healed instantly, and the explosive chaotic true fire and the thunder of the Heavenly Tribulation became docile, running honestly in Cui Si's body.

As for Cui Si himself, he is immersed in another realm. Dazhong took advantage of this opportunity and instilled in him a lot of new things. Including a new set of exercises, the advanced version of "Five Elements Chaos Decision", "Pangu Five Elements Decision"!

In addition, there are some new uses for the treasure of the big clock. In the past, Cui Si thought that the big bell was just a change from the jade slip, and it could only be defended, at most it was just to send out some sound attack means.

But after seeing these new usages, Cui Si knew that there were more subtle uses of his big clock. And the previous ones, not even the fur of the fur, seem to be a big bell instead of a jade slip.

Just if you want to push the bell to exert its superficial power, you need to cultivate above the Mahayana and Great Perfection. So Cui Sicai didn't get much information from Da Zhong, and it wasn't until now that Da Zhong recognized his strength and told him all these things.