The Rulers were asking for forgiveness from the Shadow Sovereign.
They occupied an overwhelmingly advantageous position. As long as they willed it, they could have sent the Shadow Sovereign back to the empty void, yet they wished to make up with him, instead.
This was their own way of showing their respect towards a comrade, born together at the same time, as well as the greatest warrior who once stood at the forefront with his Army of Brilliant Light, in the war against the powers of the Sovereigns.
Although the Shadow Sovereign was never their leader, his comrades nevertheless respected him greatly.
And that was why they ignored the command from their leader, the 'brightest Fragment of Brilliant Light', to get rid of the Sovereign and instead chose to kneel before him.
[We no longer have any reason to fight each other.]
The enraged voice of the Shadow Sovereign resounded throughout the land next.
[What do you mean, there's no reason??!]