It was almost impossible to think about, even with a mighty warrior like Night Terror, the kingdom of Red Mine used to lose?
From the description, Twilight won several battles… but that was all that was said. Nothing was spoken of a lose. It just said "What is left is now corruption and carnage."
It said a lot and at the same time said too little.
Northern didn't want to impose his thoughts too much on what the description could be.
It could mean what befell Twilight and the kingdom he fought for or it could simply be talking in the trails left as madness consumed them and as opposed to the pride and joy Twilight donned this armor, what was left was now corruption and carnage.
Northern found no better link for it than the madness. He had seen how insane it drove a warrior.
But that was him imposing his thoughts on what the description could be.