Castle of Black Iron - Chapter 1905 - Sweeping Over Demons (VII)

Born naturally defective but possessed by the spirit of a divine dragon. Inheriting the divine dragon’s will and power, growing scales and magical claws, imperial waters containing the breath of the dragon, travelling through clouds and summoning rain, an invincible physical body. In this world and era, countless men dream of slaying dragons. Li Mu Yang has always lived a hard life.

- Description from Novelupdates

Five hundred years ago, the world was awakened, bringing dungeons, mythological beasts, new races, and lost continents to the surface. It also brought the opportunity to awaken and become strong, but not everyone had that opportunity.Elliot is one of those young people who yearns to become an Awakened One but has not yet succeeded.Despite that, he is different.His desire for power is so strong that he never becomes discouraged despite being mocked and despised by the world for belonging to the group of those Rejected by the System.He still longs to become an Awakened One.His desire for power is so intense that when the long-awaited day arrives, he shakes the foundations of the world, allowing him to become one of those acclaimed Awakened, receiving an amazing and unique class.Although powerful enemies surround him, his intense desire for power will allow him to look beyond what his eyes can see as he rises above the world and achieves Glory.

This is a story about the protagonist getting the system, going crazy in the biochemical apocalypse, producing aircraft and tanks, destroying zombies, saving good people and killing bad people.

- Description from novelbuddy

While the demons were rising, mankind was about to become extinct. Six temples rose and protected the last territory of mankind.