How Come I Am Invincible Just After I Left Novice Village?

When he woke up, Li Changan traveled to a different continent. Here, immortal cultivators roam the world, and monsters and demons roam the great swamps. Li Changan's master told him since he was a child that our village is ordinary and the outside world is scary. So Li Changan lived in Xinshou Village for eighteen years, until his master gave him a marriage contract, and Li Changan was forced to leave the village to get married. Huh? Why is the outside world different from what I thought? How come they die with just one stab? …………