I'm Already a Martial Saint, and the System Just Came?

Xie Guichen encountered a strange thing. He, the martial saint of this world, was bound by a system with a sloppy style, and the tasks issued were like child's play. With the mentality of retiring and having fun, he used the lowest level of martial arts to work the most outrageous job. Until he discovered that those who also owned the system and were called "chosen ones" were going crazy, missing, or turning into monsters imprisoned in chains one after another. They chanted "door," "altar," and "cleanse." The jade pendant fragments he picked up had the same source as the system's rewards, but they could calm those crazy people. The enemies he defeated carried the same ominous aura as the ancient ruins. And deep in the database of his mentally retarded system, there were only a few words about "the damage to the lawful array" and "the seventh calibration failure." Xie Guichen closed the fake "A Brief Analysis of Basic Grappling Hands" and looked at the giant shadow in the deepest part of the fog. He suddenly understood that this was not a superstar training plan. It was an out-of-control experiment spanning the ages. And his unexpected "maximum level account" became the one who broke into it... Unique variable.