Cave Survival: An Invincible Life Begins with Sign-In

What would happen if all of humanity were trapped in an underground world?

Luo Yi obtained a sign-in System. Each day, he could get all kinds of trait cards and modify the information of anything he appraised.

Trait: Double efficiency

Trait: Double the quantity of items

Trait: Raise a skill's level to the cap +1

Trait: Obtain one monster girl

Luo Yi promptly raised his Appraisal skill beyond the level cap, allowing him to see all kinds of tips.

While everyone else was still worrying about food, Luo Yi had already filled his trade listings with all kinds of food.

While everyone else was still preparing to enter the lower levels of the underground world, Luo Yi was already soaring through the skies and delving underground, roaming the entire place at will.

While everyone else was still gathering materials to build homes, Luo Yi was already lounging in his castle, surrounded by beautiful women.

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.