Astral Pet Store (WN) - Chapter 776 - Instant Take-down

While reading a book, a sparkle of light disappeared. And, as it did, a message appeared.

The moment when mercenary leader Kwang Hwi receives video game like abilities, the world is suddenly thrown into chaos. A thick fog envelops the Earth, bringing with it savage, otherworldly monsters. At the same time humanity has been rendered defenseless against this onslaught, as the strange fog turns most weapons to rust. With mankind spiraling towards oblivion, it is up to Kwang Hwi, with his new abilities, to save the world. Watch as Kwang Hwi leads his militia and becomes the last bastion of humanity. Will he be this world’s savior, or its conqueror?

This story is set during the end of the Sui Dynasty, a time where multiple powers struggled for supremacy and power.