Although the Phaethon Boundary Stele appeared several hundred years ago, modern adventurers only discovered it in the past decade or so after stepping into the seventh layer of the Abyss.
As for the warning texts inscribed on the boundary stele, they consisted of only a few hundred characters. Because the writing originated from ancient times, virtually no one among the modern Abyssal Remnants could read it.
After more than ten years of research, a small portion of the content was finally deciphered.
Chapter 497