The coin of good and evil burned. Of course, it always burned, but that burning was normally restricted to one half of it, the other being lush and pleasant. But now both halves burned.
Forests had been reduced to ash. Grassland to dust layered thick upon rocks. The streams and rivers has evaporated, consumed in the heat.
The war had fared well for the demons - At first, their invasions consisted of nothing more than the scouting parties normally sent to gauge the strength of the oppenent. As news came back of sickness and death among the angels, there was a mass attack. Taking advantage of this weakness, the demons swarmed onto the other side of the coin, butchering all in their wake. They had encountered a few pockets of resistance, but on the whole they were successful, leaving not a single angel alive on the coin.
This done, they dug deep. Going down further and further, they uncovered vast deposits of molten rock, under huge pressure. These were released, and the magma burst forth. From the magma came fire, and from the fire came destruction.
The demons were prefectly fine. They were beings of fire themselves - they exuded it from every pore, and the blazing infernos just pushed them to new frenzies of acitvity.
During these frenzies, the population exploded. Normally the vast output of the spawning pools was kept in check only by the constant warring with the angels, but this had stopped. There were new spawning pools too, several demons trying to create a bloodline of their own. These two factors combined to form a population explosion within the demon numbers.
They were restless, though - as their numbers grew, they become more and more crowded. Though there was some fighting between the bloodlines, they preferred to fight outside foes.
The cities and fortresses of the angels had collapsed, be it from the raging infernos or the violence of the demons. There was one structure that still sttod, though. A fortress, out of place in design and shape, resisted all attacks and weathered the fires. As the demons searced for new foes, a consensus was reached - they would find them here.
It was thus that Krovork led the stream of demons into the fort. It was the first Duniir of its bloodline, and this gave it comand over those of its blood. Their bloodline was one of beings akin to winged spiders, but their skin was hard as steel and burned hotter than any furnace.
Demons of all bloodlines streamed into the fortress, lusting for death and destruction, for burning and maiming. Though many of them would die, for each that fell there would be a dozen more. By sheer force of numbers and their burning fury they would sow destruction through this fortress.