Apocalypse + stockpiling heavy weapons + dark revenge + a troublesome System + power upgrades.
Reborn in the apocalypse, he unexpectedly gained a storage space and the ability to pass through walls. Using his powers, he collected food, clothing, and other necessities, and stockpiled countless land and air weapons from a superpower.
He built a safe fortress in the apocalypse, but was repeatedly bullied and humiliated. The flames of revenge slowly rose within him. The space had a bug that kept urging him to be kind, but advice was just advice. He remained decisive and ruthless.
When the apocalypse arrived, natural disasters and human calamities made people increasingly cruel. Endless conflicts drove his powers to keep upgrading and expanding, but his enemies kept growing stronger too. As time went on, survival became more and more difficult.
In a world turned dark, only by growing stronger and fighting with courage and intelligence can anyone ensure the continuation of life.
