I Asked You to Unseal Your Territory, Not Release an Ancient Forbidden Being!

In a world where everyone can become a lord, each person gets the chance to unlock a sealed territory. Successfully breaking the seal makes you a lord. All the native inhabitants of your territory will submit to you, helping you slay monsters and fend off invaders so your territory can level up and grow stronger. Some people unlock a Black Wolf territory, where packs of wolves hunt tigers and slaughter monsters in a frenzy, their levels soaring! Some unlock an Undead territory, unleashing calamities with a wave of the hand and becoming gods in a hundred years! Some even unlock an ancient Dragon Clan territory, where one dragon can destroy a city and conquer the Myriad Worlds! Chen Yi transmigrates into this world. He spent five years in his third year of high school, and at last he breaks the seal on his own territory. But when he sees that his territory has fewer than ten households, and every native resident is a lonely old person, his heart sinks. On the day he becomes a lord, the first wave of monsters arrives. A streak of sword light descends from the sky, instantly killing hundreds of monsters. “I haven't drawn my sword in a hundred thousand years. I'm a little rusty. Please punish me, my lord.” Chen Yi: “???” The second wave of monsters arrives, numbering over a thousand. A streak of sword light descends from the sky, instantly killing every monster. The third wave arrives, numbering over ten thousand. A streak of sword light descends from the sky, instantly killing every monster. “13, that scrap-iron sword has stolen all the glory again. Next time, I'll have the monsters point out the location of their lair.” “Watching the lord level up is so satisfying. Too bad I haven't cultivated my realm. Should I invite the Heavenly Dao over and have it help me train my level?” “Holy crap, invaders! Haha, this time it's my turn to fight!” Chen Yi: “Well, would you look at that. Everyone in my territory is a forbidden existence. Does that mean I've been forced to become invincible?”