The Great World instinctively rejects cursed worlds, and they cannot forcibly interfere with this, at least not now, as excessive interference would only provoke the true instincts of the Great World.
Moreover, even if they forcibly complete the subsequent integration, the issues it would cause would be no less, but those issues are manageable.
It is a world cursed by the Remnant Ashes of Annihilation; they do not know how much of the Remnant Ashes of Annihilation Zheng Yichen has poured in, but with that world cursed, the entire Misty City World has 'transformed'.
While the original characteristics of Misty City World remain, what was once a delicacy has now become a large piece of incombustible radioactive material.
Delicacies are things the Great World instinctively consumes, but radioactive material is a different matter.
