First, the other side could endlessly create Emperor-class and higher Honkai Beasts, and possessed the highest authority over every Honkai Beast. In other words, even officially recognized Herrschers like Bronya, Mei, and Little Angel Sirin could not sway the minds of the Honkai Beasts in the slightest.
Next, she displayed absolute control over Honkai Energy, and the total amount of Honkai Energy within her was simply greater than the combined total of every Herrscher Core other than the Herrscher of the End!
Based on the experience Doctor Mei had gained fighting the End in the previous era, the other side possessed the Authorities of every preceding Herrscher and could use them casually. The power she displayed was several times stronger than that of the original Herrschers. After all, the End had an immense amount of Honkai Energy, and her control techniques far surpassed those rookie Herrschers who fundamentally did not know how to use their powers.
And that was not even the most difficult ability to deal with. What truly drove people to despair was her nearly invincible armor and Honkai Energy resistance. As long as an attack was powered by Honkai Energy, it could barely hurt her at all. Back then, the eight Fusion Warriors fighting the End on the moon were like a group of ants biting her—they could not even break through her defenses. That was why she had casually swatted two Fusion Warriors to death from the start... Only after Doctor Mei used the Moonlight Throne to weaken her Honkai Energy by thirty percent did she lose that near-perfect armor and magic immunity. Only then, with Ancestor Kevin going all out, did they finally manage to injure the Herrscher of the End... In fact, the reason the Herrscher of the End stayed on the moon without