I'm a Demon Cultivator, What's Wrong with Cultivating a Few Zombies?

[No system + Demon cultivation + Decisive killing + Interpenetration of two worlds + Multiple heroines + Slow heat] After being transformed into cannon fodder for the demon sect, only one person survives after ten years of cultivating Gu, and the start is on hell difficulty! Fortunately, Night Breeze can travel through the doomsday wasteland! Both worlds are my resource library! A pack of instant noodles can be exchanged for a box of spiritual stones at the end of the world! [Ordinary Zombies] → [Bronze Fierce Zombies] → [Swallowing Nine Nether Cold Iron·Flying to Zombie in Half a Step] → [King of Ten Thousand Zombies]! [Abandoned Factory] → [Mobile Immortal Mansion·Tingyuxuan] → [Eight-Legged War Fortress Rampant in the Wasteland]! [Bottom-level disciple of the Demon Sect] → [Doomsday Arms Oligarch] → [The only super villain in both worlds]! Strength increased a hundred times! Wealth increases ten thousand times! Are your fellow disciples still fighting for life and death over a low-grade spiritual stone? Ye Feng silently took out a mountain of spiritual stones and used it as a teething stick for his zombie pet. Senior sister, are you still worried about a book of exercises? Night Breeze has evacuated the Ancient Immortal Mansion, and the jade slips of the martial arts are piled up into a mountain! "Ancestor Tianyin wants to seize me? The ghost king in red wants to enslave me?" "Wait until I integrate the resources of the two worlds and create a tide of billions of corpses. Gods can block the gods and kill the gods, and the demons can block the demons!" "My goal is to become the strongest sixth in both worlds... Ah no, the only king!"