Doomsday Game: Start by Hoarding Tens of Billions of Spirit Stones

The end is coming, the game merges with reality, and monsters invade. Bai Chi died in despair, but was unexpectedly reborn more than a hundred days before the end! Take this opportunity to prepare in advance because of the foreknowledge. Lack of will at the end of the world? Look at what's in the big warehouse... Monsters are attacking the city again? I have a sword... Extreme weather? This is the safe house I built...