"Alas, had I known this battle formation was so powerful, I should have practiced it sooner!"
After learning the intricacies of the battle formation from Leng Xuan, the Bull Demon King and the other Six Great Demon Kings immediately began to practice. As a result, just as Leng Xuan had said, the combat power they displayed was indeed twice as strong as before!
This was despite the fact that the Bull Demon King and the others were new to the battle formation, and their coordination was somewhat rusty, with some hindrance in the interaction of their powers. Otherwise, the formation's might would have been even more formidable!
"This battle will not be our last against the Heavenly Court. We will have plenty of opportunities to familiarize ourselves with this battle formation in the future; we just need to practice it slowly."