Mad Dog Bites: I Design Uchiha Izuna from the Start!

[Urban Advanced Martial Arts + Fiction Rewriter + Tomato Original + Spiritual Qi Revival + Designing a Mad Dog + Fictional World] My name is Wang Jiahao. I accidentally transmigrated to a parallel universe where the Naruto mobile game was a worldwide sensation, and the System told me that spiritual qi was about to revive. The ninjas here are complicated, so I turned around and created Mad Dog Izuna, shocking the entire internet and unlocking ninja blueprints. Then the day came when spiritual qi revived and monsters descended. To everyone's horror, they discovered that the ninjas they'd cursed as downright sinister had become the city's only hope of protection. When an army of White Zetsu invaded Earth, the protagonist brought out Mad Dog Izuna to tear into them. [Urban Advanced Martial Arts, Tomato Original, not fan fiction or a derivative work]