Upgrade of Rules: from Broken Iron Sword to Gods

In a strange era, rules are coming. Do not look in the mirror after midnight. Knock three times and someone will die inside. When the bell rings three times, the listener falls asleep. Tens of billions of people entered the trial field. Others followed the rules and survived, but Lu Chen changed the rules and killed people. He opened the rule book and wrote the first line: knock on the door three times at midnight, and the knocker must open the door and show up. The first rule is rewritten. He is not a lord, he is a hunter. While others upgrade their weapons, he upgrades his sister's amulet, which costs five times. They laughed at him for being stupid until the protective barrier blocked the weirdness. Three months later, there was only one sentence on the list of geniuses from all realms: Number one on the list, Lu Chen. His weakness is also his bottom line. But then he searched through the entire era and couldn't find a single line of explanation: Why does the more he cares, the more expensive the upgrade is; the more expensive it is, the more unique the upgrade is. Until there was a crack on the amulet. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.