Becoming the Monarch

At 15, he lost his right arm on the battlefield... By 24 he had picked up all kinds of tricks and skills yet was constantly told similar things. "I'm only going to get more gray hair teaching you to become a spearman.", "There's nothing you can't learn, but it's so inefficient.", "Hey, let's just harvest herbs. Why do you insist on learning swordsmanship?", "Just live a normal life." Now 39, he also lost his left arm and fell off a cliff with an unknown artifact swallowed...