The force with a Supreme at its helm and one without is entirely different concepts... After all, the gap between Emperor Peak, Dominator, and Supreme is too vast.
For a regular Emperor realm facing a Dominator, there may be a threat to life, but at least by hiding in their home Cosmic Realm, they can stay safe and sound.
As for the Supreme, by paying a certain price, they can destroy a Cosmic Realm.
Not to mention that Supremes have numerous mysterious methods, such as causal perception, destiny investigation, Void Realm assault, and so on... In short, a Supreme absolutely surpasses a Dominator.
This leads to any Dark Domain that gives birth to a Supreme becoming the undisputed absolute overlord of that Dark Domain.
If a force only gives birth to a Dominator,
such as the Tianluo Universe Alliance, Immortal Court... While also being hegemonic powers in the Eighth Dark Domain, they mainly focus on forming alliances when facing the powerful Emperors of many Cosmic Realms.
