Underground Invasion: Saving Humanity Starts with Blacksmithing

The world changed, underground lairs invaded, and humanity was in peril. Gu Fan transmigrated into this world and awakened a pay-to-upgrade System.

While others spent three years learning the basics of blacksmithing, twenty years becoming competent, and fifty years mastering the craft, Gu Fan became a grandmaster in the blink of an eye.

When others hit cultivation bottlenecks and lost sleep night after night, Gu Fan's cultivation advanced by leaps and bounds every day.

A master weapon-smith said, "What? You want a custom divine weapon? No, no, I can't do that. You should ask Gu Fan instead. His weapons are invincible among those of the same rank!"

A sect of alchemists said, "Ask our founding patriarch to refine pills? The patriarch isn't here. Where did he go? To Gu Fan's place to learn alchemy."

A human powerhouse said, "I've cultivated bitterly for ten years and finally broken through to the eighth-rank Martial Saint. Now it's time to settle the score with the other races... What? Gu Fan kills ninth-rank Martial Emperors from the other races like chickens?"

The countless alien races cried, "That human monster is here! Run!"

Gu Fan said, "Want to learn this? I'll teach you. But first, get in line and pay."

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.