Mitou Shoukan://Blood-Sign - Volume 1, Prologue

One day, I was given the mysterious power of Hwanmong.

I possessed a character with an intelligence of 100 in a classic medieval fantasy land-grabbing game. An intelligence score of 100. That meant my predictions were always accurate. However, since I was physically weak and didn’t quite understand why that was the case, I thought it best to just live quietly. But then… leaders who began to recognize my ability started to become obsessed with me.

“Give me a bunch of adorable players, and I can easily overturn a parallel world!” - so said Reveno·Murphy·Le SenbulaPs:The titles owned by the honorable Murphy include but are not limited to counterfeit vampire, celebrated NPC role-play artist, multi-talented Dog Planner, the only savior of Transylvania, benefactor of the old continent, defender of the new continent, brave and loyal earl, irredeemable big-sister fanatic, spotless saint of the Blood race, Alpha of the Night's Guard, and so on (here ignoring the other 108 nicknames). He's indeed the homebody of the Fourth Cataclysm and the best old friend when you need to clean up a mess, thus all testers of “Real Different World,” please stand up when you see this line! Let us give Lord Murphy the highest respect!Murphy, ka-ka! Full marks!

Luo Zheng is at the bottom of the Luo Clan hierarchy, despite his family being the founders of a power refining technique that could instantly defeat any opponent.

One night, enraged by unfair treatment from a family steward, Luo Zheng burns the family records. In doing so, the hidden magic in the book engulfs him and Luo Zheng becomes a new skilled fighter. Fleeing his home and despicable clan, Luo Zheng must learn to harness his powers to rescue his younger sister while his own cousins are on his pursuit.

- Description from Novelupdates