The alien creature "Big Point" has arrived, and humans have formed a blue alliance. They use source energy to strengthen their bodies and use dead iron to forge swords to guard the planet secretly. Over the past hundred years, countless warriors have smashed their heads into dust and performed meritorious deeds in the sky, but time is getting increasingly urgent! The last line of defense of Azure is on the verge of collapse, and mankind has reached the moment of last resort! The young man holds a sword and is invincible. He is Han Qingyu, a ten-year recruit with a well-known reputation. ..