At least four strong ancient beings fell within the Flamefire Realm.
When the great battle erupted, Black Blade assembled the Immortal Legion forming an indestructible battlefield realm, trapping two ancient beings within.
This scene was witnessed by many lurking observers.
Black Blade wasn't planning to hide anything at all.
Nor was An Jianyou.
If she wished, after she devoured the Ghost-Faced Baron and Lord of Black Smoke with the Netherworld, there wouldn't have been any other movements. But she deliberately threw out the corpses of these two ancient beings for all the coveters to see.
This is to kill the chicken to warn the monkey.
Even beings like the Lord of Black Smoke have fallen, how would they dare to harbor improper thoughts towards Flamefire anymore! Besides, people tend to pick on the weak, they targeted Flamefire before because they thought Flamefire was vulnerable and possessed treasures... Now? Better not provoke, better flee.