Why don't you learn it yourself

Inside his body, Zeal received a bit of life energy and mental fortitude, he didn't know how he was invigorated, but he felt his soul renewed. So he walked forward amidst his shaking body and called out.

"Come forth, the red kings!"

Following his word, a special force dyed the space red. Yes, red, but it was only for a moment before darkness covered the whole area again. That showed the true magnificence of the black emperor. In their territory, everything below them must stay oppressed. Following the sharp change, the sky roared again with red lightning and the cries of dragons. And shortly after, five wicked red dragons appeared. Although they were big, they weren't as big as the black emperors. The two black emperors were the same size as the five red kings, merged together. The five red dragons had no golden rings; these golden rings were like approval of some sort.