Swallowing the Nine Desolate Realms

Good-for-nothing from the start, a broken engagement, a devouring-system cultivation path, a demon lord, and an awakening of a useless constitution that defies heaven for love. His fiancée breaks off the engagement right in front of him? He turns around and gains a Chaos inheritance, growing stronger by devouring everything! You call me a demon? Then I'll rule the world as one! You say I defy heaven? Then I'll rebel against heaven itself! But after I accidentally save that cool and noble Holy Maiden of the Sacred Land, she becomes my greatest tribulation and… my one weakness. When fate tells us we must kill each other, I will defy heaven and change our destiny, and fall in love with her! See how a generation's Demon Lord fights for the woman he loves, shatters the heavens in fury, and becomes the only Emperor Venerable in the Myriad Worlds!