System Invasion: I Became the Source Code of the Anti-System from the Start

The soul of a White Tiger transmigrated to Earth, 200 years into the apocalyptic era, becoming the source code of an anti-System. It successfully installed itself in the corpse of a disfigured young woman at a funeral home! An alien invasion brought a BT infection virus, plunging humanity into the apocalypse. Countries around the world fell, but thanks to advanced medical technology, humanity created antibodies to the virus and developed BT ability genes, gaining an overwhelming advantage against the alien virus! Five years earlier, a mysterious System invasion brought the apocalypse to Earth, changing the planet's fundamental energy. Humanity awakened to a new cultivation system, one countless times more powerful than the BT ability genes…!