An ordinary time traveler from the earth carries the super invincible emperor system and travels to the Lingxian Continent. What a loser? It doesn't exist. Just buy a Marrow Cleansing Pill from the Emperor Mall.
Someone wants to usurp the throne? Direct killing, the territory is too small? Beat until it's big enough.
Let's see how Lin Feng relied on the super invincible emperor system to promote a small vassal state into a super overlord dynasty, killing all disobedient people and countries.