The triangular spacecraft sped through the vast starry sky and, in no more than a moment, arrived outside an incomparably immense city.
It was a colossal city that stretched boundlessly across the land, its end nowhere in sight.
It was like an ancient continent, emanating an aura of age and antiquity, mixed with a chilling, murderous air.
Jet-black walls stood towering at least ten thousand zhang high, like immense mountains. Upon those walls, seemingly forged from poured steel and cast iron, countless densely packed runes had been engraved. They radiated power that made hearts tremble, forming a terrifying grand formation that manifested an invisible barrier enveloping the entire city.
"Is this Hangu Pass?"
Lin Baichuan and Mu Yankou stepped out of the triangular spacecraft together. Looking at the boundless ancient city before them, their pupils shrank to pinpoints as Lin Baichuan murmured, "What a profound formation.
This is an immortal formation..."
"That's right. It is an ancient immortal formation passed down from the era of the Human Emperor."
Mu Yankou nodded, then sighed softly. "Unfortunately, this formation is damaged. If it were at its peak, even an Immortal Emperor could not break it.
As for now, when operated at full strength, it can withstand an Immortal King's assault without shattering..."
"Immortal Emperor? Immortal King?"
A sharp light flashed in Lin Baichuan's eyes, and he was secretly startled.
This ancient immortal formation had actually been passed down from the era of the ancient Human Emperor. It truly was ancient beyond measure.
"A formation capable of blocking an Immortal Emperor must at least be a ninth-rank immortal formation. Even damaged, it should still be equivalent to a sixth-rank immortal formation."
Lin Baichuan pondered silently.
Ever since obtaining part of Tongtian Daoist's inheritance, Lin Baichuan was no longer completely ignorant of the Eternal