I Can Transform Into a Zombie

After the Apocalypse, I discovered that I could become a zombie. I could kill humans or zombies to evolve and level up, and I could command zombies and improve them. From then on, the entire world began to tremble. Any powerful enemies where the zombies I commanded went to would be shredded to pieces. Wealth, power, women - there is nothing I can't get. In this Apocalyptic world, I'm the undisputed king of the world. (A lighthearted read with some dark scenes, not for the pure hearted.)