Blizzards hit the world, entering a century-long ice age (-80°C to -120°C)
The protagonist obtains a sign-in system for all things and a growth-type internal space.
Growth space:
· Early stage: 100 square meters of open space, a spiritual spring, and the time flow rate is 1:1. For storage and keeping alive.
· Mid-term: Expanding to the football field, black soil appears, the time flow rate is 10:1, extraordinary crops can be planted, and low-level mutant beasts can be raised.
· Later stage: A small world of its own, with mountains and rivers, and a time flow rate of 100:1. It can accommodate living people, evolve the ecology, and become the spark of civilization.
