The strength of the God King in Heaven is among the top within the God Kings, even stronger than the Nine-tailed King by a bit.
In the past, he and Lusman were evenly matched. He hardly paid any mind to anyone else except Lusman as, back then, Zhang Huang and the others hadn't yet broken through to God King status.
To his surprise, after thousands of years, Zhang Huang and the other two had all become God Kings!
And those four standing together fill him with an unsettling feeling, much stronger than a usual group of four God Kings, reminding him of the ruler.
