I Am Fahai, the Monk. Demons, Know Your Place!

He transmigrates into the body of a young monk named Fahai?

He gets a Demon-Slaying System from the start, and it even grants him the power of the Mighty Heavenly Dragon?!

Here, there are courts and halls, the martial world, demons and monsters, and cultivators.

Though high in the temple halls, he worries for the people; though far from the rivers and lakes, he worries for his sovereign…