The Original Realm Gate is just that large, even if people migrate batch by batch, it is absolutely impossible to relocate everyone in the whole world.
Moreover, Zhang Xiaoman believes that he does not have the power to control others' destinies. He has reached a level where he can clearly perceive the difference between the two worlds. The Original Realm, after all, has a lower boundary value and is a smaller world; this cannot compare with the true Big Universe. For an ordinary person, it might not make a difference, but for a true Dark Spirit, it's like the difference between a pond and an ocean, a world apart.
Perhaps Zhang Xiaoman can bestow a certain number of authorities to those Dark Spirits, but the quota for such bestowal is ultimately limited, and he cannot possibly turn all the Dark Spirits of the Original Realm into invincible beings.
