Catty Catty Catty

As disaster was about to strike, a group of survivors transmigrated into a desolated world and were challenged to a game of survival. From terrifying acid rains, to endless natural disasters, the heavens burn while the earth scorches, radiation is rampant, and nobody is spared from the dangers of this hellscape. The only way one survives is by building a shelter and slowly upgrading it in hopes of surviving another day. 
Luckily, Su Mo awoke a Doomsday Survival System that allowed him to infinitely level up and upgrade his shelter! The main shelter wooden door can be upgraded into a metal door, which in turn upgrades into a composite gate; the wooden spears can be upgraded into bronze spears, which eventually upgrade all the way into electromagnetic spears... While everyone struggled to survive, Su Mo was fully loaded, and well equipped to dominate the post-apocalyptic world. 
"While some of us are lighting oil lamps, he's been using refrigerators!" 
"The walls in his shelter alone are tens of meters thick, it's the safest place on this planet."
"Before I die, I wish to spend one day in his shelter..."

EndlessFantasy Translation 

My Post-Apocalyptic Shelter Levels Up Infinitely!

LambSheepMutton

The inside territory of the ents was extremely hard to infiltrate. This was the unanimous conclusion of all the demon souls who had been lurking in Thousand Trees King City.

There were all kinds of strange plants, and the guard vines were scattered everywhere, even in remote corners.

It would be safe to sneak in for a day or two, but the vines would have extracted and observed strange behavior patterns after an extended period. Capturing an infiltrator could be decided in seconds by the person in charge.

The demon clan had nearly 800 spies caught overnight in the earlier stages because of this mistake and suffered heavy losses.

However, as time passed, the demon souls learned to adapt and learned the various skills needed to disguise themselves in the ents' territory.

Splurge Your Riches, Rich Lord Iron Thorn!