[Cathartic thrills + ruthless decisiveness + no hiding one's strength + factions + invincible protagonist + multiple heroines]
After transmigrating for eighteen years, Qin Yang becomes the young prince of the Martial Prince's Estate. With mediocre talent and a ninth-stage Qi Refinement cultivation, he's widely regarded as a case of a tiger father and a dog of a son.
He cultivates his character and takes life as it comes, until his father goes missing at the front lines and the Martial Prince's Estate loses its power overnight.
When his emotions hit a breaking point, the System activates.
[Shadow Balance Domain: Within its range, a shadow copies the strongest person's combat power, remaining permanently at a fifty-fifty match.]
Qin Yang: "I've spent eighteen years cultivating my character, and now you tell me the System activates through emotions?"
System: "Isn't the point of cultivating the Dao to have your thoughts run clear?"
And so...
A Golden Core cultivator comes to investigate, sees a Golden Core peak-level "guard" standing behind him, and runs away.
A Spirit Transformation cultivator comes to test him. The "guard" suddenly unleashes the aura of a late-stage Spirit Transformation cultivator, and he runs away too.
A Saint arrives. The "guard" displays Saint-realm combat strength, and the man drops to his knees on the spot!
The Great Emperor breaks down. "My lord, what is your cultivation level? Why can I never surpass yours?!"
From then on, all of the Northern Region spreads the word that an unparalleled expert stands behind the young prince of the Martial Prince's Estate.
Qin Yang thinks to himself: That's just my shadow.
I really can't watch the protagonist having a younger sister.