Before the stairway entrance.
Li Su could not help but raise his head. The stairway before him was ten thousand meters wide, with each step standing nearly fifty meters tall.
A single block of stone weighed roughly ten thousand tons.
Strange patterns covered them, every single one. The lines between these patterns were not scattered chaotically, but formed a whole, somewhat resembling human fingerprints—strange, grotesque, and profoundly mysterious.
Looking at this enormous stone bridge, Li Su was somewhat shaken.
He recognized the material this bridge was made from.
Within the Celestial Emperor Canon, aside from Dao arts and divine abilities, there were also extraordinary auxiliary arts: artifact forging, pill refining, talisman crafting, and formations were all included.
Although Li Su did not yet have the authority to view the specific method for refining this material, related illustrated manuals described this special kind of stone.
It was called Eternal Stone!
As its name implied, it was a stone that the passage of time could not erode.
The method of producing it was astonishing. According to the records in the canon, even in the era of the Ancient Heavenly Court, only the most elite artifact-forging groups could forge it.
The required techniques and realm were both extraordinarily demanding. At the very least, judging from the Celestial Emperor Canon's introduction, it would still be very difficult for Li Su to make it at his current level.
This stone possessed incredibly high defensive power. Even a Great Luo realm cultivator would find it extremely difficult to destroy.
There were two reasons for this.
First, it was highly inert, reacting very little to all external substances. Once refined, even mana could not infiltrate it.
Second, there were the special patterns on its surface. These mysterious and grotesque markings were far from simple—they were its veins.