Demon Cultivator's Apocalypse

Lian traverses to the Cultivation Realm, becomes a disciple of the demonic Nether Soul Sect. His Master chooses him as Primary Soul for a Soul Banner. A System appears, sending Lian to the Apocalypse World. Zombies provide Living Souls; Crystal Cores enhance Cultivation. Lian forges a Myriad-Soul Banner. He returns to the Cultivation Realm to kill his Master, takes the female Sect Master of the Nether Soul Sect, and dominates the demonic region.