Radiant light surged as the entirety of it was teleportation force.
At that moment, Chu Feng found himself inside a teleportation tunnel.
A teleportation tunnel was nothing new — after all, once you stepped into a teleportation formation, you would enter one and travel through it.
But now, standing within this particular teleportation tunnel, Chu Feng was wide-eyed with shock.
The reason for his astonishment was that this teleportation tunnel's speed was far too fast — beyond anything he could have imagined.
Every wisp of teleportation force here should have been a priceless treasure on its own.
Yet such teleportation force existed here by the billions, forcibly merged together to form this tunnel.
Even though Chu Feng was well-traveled and worldly, the moment he laid eyes on this teleportation tunnel, his first reaction was that it felt like a dream.
This… had already exceeded the boundaries of his understanding!!!
"Such powerful teleportation force — if I hadn't seen it with my own eyes, no one could have made me believe it."
"The Nine Heavens Secret Ground — what kind of secrets do you truly hold?"
As Chu Feng was awestruck, his curiosity only grew.
After all, the reason he had entered such an incredible teleportation tunnel was because he had used an opening formation to unlock that mysterious giant gate.
When the opening formation merged with the mysterious giant gate, Chu Feng had been pulled into this teleportation tunnel.
Therefore, Chu Feng deduced that at the end of this tunnel most likely lay the secret of the Nine Heavens Secret Ground.
After an hour had passed, Chu Feng finally emerged from the teleportation tunnel.
He now stood atop a raised platform. The scenery surrounding the platform told Chu Feng that he was inside a grand stone hall.
And the platform he stood on was positioned at the very center of the hall.
Turning around to look, behind Chu Feng stood a gate that was ten thousand meters tall.
This gate was not connected to any wall — it stood upon the platform like a statue.
It did not resemble the mysterious giant gate from before. This gate looked far more refined, as though forged from gold, resplendent and magnificent.
However, residual traces of teleportation force lingered on this gate.
It was clear that Chu Feng had arrived here through this very gate.
Once the teleportation force dissipated, the gate was merely ornate — nothing more. Chu Feng could not observe anything else from it.
He quickly determined that while this gate was powerful and certainly a supreme treasure in its own right, it harbored no secrets. It was simply a teleportation point for a powerful teleportation formation.
However, the aura it emanated was exceedingly ancient — it should have been a product of the same era as that mysterious giant gate from before.
As for the grand stone hall where Chu Feng now stood, although everything within it also radiated an aura of immense age, Chu Feng could deduce that the hall, despite being ancient, had likely been constructed during the Remote Antiquity Era.
But the refined giant gate behind him and that mysterious giant gate lying across the earth were both artifacts of the Primordial Antiquity Era.
From this, it could be inferred that this place had first had the gate, and only later the palace built around it.
Chu Feng observed carefully and found that apart from this Primordial-era gate at the center of the hall, there were no other furnishings.
However, at both ends of the hall were two stone gates. One of them likely led deeper inside, while the other probably led to an entrance or an exit.
Both stone gates bore carved patterns.
But only the pattern on the gate leading deeper caught Chu Feng's attention.
The pattern concealed profound meaning — it was clearly a kind of barrier cultivation technique, and a remarkably mysterious one at that.
If he could comprehend it, it would greatly enhance the focus of Chu Feng's Mental Power, quite possibly making his Heaven's Eye stronger, and his formation-crafting abilities would also be elevated.
Although mastering this technique would not help with Chu Feng's cultivation realm, his overall combat strength would be dramatically increased.
The only pity was that the technique on the gate was incomplete.
But Chu Feng discovered a clue from the gate — the complete version of the technique was hidden behind this very door.
"The technique behind this gate — is that the secret of the Nine Heavens Secret Ground?"
"No, no."
Though the technique was formidable, Chu Feng quickly dismissed the notion that it was the secret of the Nine Heavens.
The Nine Heavens Secret Ground had been built during the Primordial Antiquity Era.
This grand hall had been constructed during the Remote Antiquity Era.
But on second thought, even though the stone gate and the hall were both built during the Remote Antiquity Era, that did not mean the Mental Power technique inside the hall also belonged to the Remote Antiquity Era.
Perhaps this Mental Power technique originated from the Primordial Antiquity Era — perhaps it was the very secret of the Nine Heavens Secret Ground.
"Could it be that someone during the Remote Antiquity Era discovered this place's secret and deliberately built this palace to hide it away?"
With this thought, Chu Feng examined the hall more closely, but he could see no way to open the stone gate.
The gate had only a keyhole on it — only the matching key could unlock it.
"How despicable."
Chu Feng couldn't help but curse aloud.
But despite his cursing, Chu Feng did not give up.
Instead, he walked toward the stone gate that likely led to the entrance.
This stone gate had no obstacles whatsoever and could be pushed open directly.
Pulling the gate open, what came into view was a deep stone corridor.
There were no mechanisms inside the corridor, and Chu Feng moved through it unimpeded.
At the end of the corridor stood a stone platform, surrounded by one hundred stone steles.
The steles were not only part of the platform itself but were also carved with barrier formations.
This was a teleportation formation, built during the Remote Antiquity Era.