Armor: Retire to Retire, but Teach an Apprentice

10 Years ago, Chen Nan used less than 50% of his own Emperor blood to buy several years of peace for the human race at the cost of serious injuries. He destroyed most of the Shadow Realm, but he could no longer summon the Emperor's armor, so he retired. But 10 years later, a somewhat slovenly man opened a martial arts gym in a relatively remote place, and he was Chen Nan. He originally wasted his time every day, but the appearance of a young man changed him, and he also unlocked a discipleship system that allowed him to enter the world again. "Dingdong, congratulations to the host for successfully having his first apprentice. He will be rewarded with 5% of the emperor's bloodline, as well as the ability to summon the Xingtian Armor and 100% mastery of the Xingtian Armor." "Ding dong, congratulations to the host for successfully having a second apprentice. The reward will be 5% of the emperor's bloodline, as well as the ability to summon Nava armor and 100% mastery of Nava armor." "..." Chen Nan: "I also want to retire well, but it's a pity that I am invincible again..."