Survive, I Can Upgrade Everything

In 2025, all "items" disappear! Humans can only survive by opening treasure chests in dense fog areas! Fang Yu, who was stabbed in the back, snatched his teammates' treasure chest and jumped into the abyss! Opening the treasure chest, it turned out that there was only a broken knife of the worst quality... On the verge of death, a voice suddenly appeared in Fang Yu's mind! "Ding! Awaken and upgrade the abilities of all things!" "Upgrade the broken knife!" You got a tetanus knife! ... [Broken knife - tetanus knife - sharp knife - multifunctional knife - titanium alloy knife - thermal knife - ion cutting knife...] My knife can be upgraded indefinitely... They finally started to panic!