Three Kingdoms: An Immortal in Cao Wei

Ren Huaian, from a later era, returns to the late Eastern Han dynasty with a legacy of immortal cultivation and becomes one of Cao Cao's subordinates. From then on, Cao Wei has an immortal backing it. Not enough food? Easy. I'll fly my sword to the Americas and bring back high-yield crops! Foreign tribes dare invade China? No problem. I'll train an army of cultivators for you, and you can wipe those invaders out like a game of tiles! Oh, and there are high-yield crops across the ocean too. Send the cultivator army to bring them back... With an immortal's help, will Zhi Cai and Guo Jia still die young? Can Cao Cao unify the Three Kingdoms? And where will Cao Wei lead China in the end...?