Divine Chosen Ones

In a chaotic world where life was at stake every year, power was the key to survival.
Once a year, the portal between the human world and the world of the undead opened in different cities around the world.
Once a year, the world granted brave warriors the opportunity to choose an ability to face the waves of zombies.
If humans won, the portal would be closed. The way to win was by killing zombies or sacrificing human lives.
When the fateful day arrived, Hsu Yan had no choice. His father had been crippled in battle the previous year, and his mother and sister were weak women.
Despite cultivating for several years, the fifteen-year-old youth had not yet entered the first stage of cultivation, so he pinned his hopes on the power the land would bestow upon him.
When it was his turn, the roulette displayed several powerful options, but only one was available for someone as weak as him.
The Blessing of Golden Light!
The most useless ability in the world, which in plain sight only served to create a brief white flash that, at most, would blind the zombies for a few moments.
However, for Hsu Yan, it was a golden opportunity, as he, coming from another world, knew how to use it.