Three Kingdoms: I Am Fa Zheng, and I Counterkill Cao Cao from the Start

I transmigrated as Fa Zheng, a strategist of Shu Han. The moment my memories awakened, I was standing outside Xiaopei. I know Cao Cao's army is about to descend, and I know I'll die of illness in a few years. After binding to the Defy Fate System, a life-extending pill drops when I devise the plan for Hanzhong, and arranging the Eight Gates formation actually brings down a meteor. Cao Mengde, this time, I'll tear up your script.