Here is a description of the realm:
Molag Bal, King of Strife, is second only to his brother Prince Mehrunes Dagon in the enmity of our Emperor. His lands are the charnel houses the slave pens of Coldharbour, which hold no contrition for those travelers that visit them in error or purpose. That Molag Bal is allowed his holiday at all hearkens back to a treaty of ancient times, when he reputedly lent his infernal power to the creation of the first soulgems.
and
'The sky is on fire,' I heard him say as he moved on to the next realm. 'The ground is sludge, but traversable. I see blackened ruins all around me, like a war was fought here in the distant past. The air is freezing. I cast blooms of warmth all around me, but it still feels like daggers of ice stabbing me in all directions.'
This was Coldharbour, where Molag Bal was Prince. It appeared to Zenas as if it were a future Nirn, under the King of [censored], desolate and barren, filled with suffering. I could hear Morian Zenas weep at the images he saw, and shiver at the sight of the Imperial Palace, spattered with blood and excrement.