Age of Gray Mist: the Return of the Guardsmen

In the third hundred years shrouded in gray fog, human civilization fell to the bottom of the era of scavenging. Lin Ye picked up a rusty breastplate in a garbage mountain, but unexpectedly awakened a data echo that had been dormant for 30,000 years: "The bloodline of the 'Guardian' has been detected... The seventh node of the ancient wilderness defense line has been restarted." The broken rune mecha, carrying the AI "Iron Egg" with confused memory, opened a door for him - behind the door was the ancient path of blood and runes, the taboo fusion of AI and cultivation, and a desperate truth about betrayal and protection that had been sealed in the dust. In Blackstone City, the powerful are experimenting with "living materials" to extend their lifespan, treating human life as nothing; deep in the gray fog, polluted mechanical creations are wandering, whispering of the madness of the past; and on the other side of the starry sky, the shadow of the crack that has been sealed by countless martyrs at the expense of civilization is spreading again... From scavengers living in the wasteland to defenders in charge of rune mechas; From a lonely fugitive to a flame bearer who restores order; The road in the forest is destined to be closely intertwined with the sleeping defense line, the lost glory, and the "chaos" that covets everything outside the world. "Tiedan, who do you think we are? Civilized gravekeepers, or... Gravediggers?" "According to logical analysis, we are probably... The igniters who refuse to accept our fate."