In the year 1200 a war unlike any The World had seen before ravaged the lands of the Nentir Vale and beyond.
In the year 700, the dragonborn of the Arkhosian empire had expanded their territory from their arid home to the south. Through largely diplomatic means the Arkhosians sought to bring knowledge, civilization, and security to the region. The Nentir vale enjoyed 300 years of peace and prosperity under the Arkhosian rule.
By the year 1000 the tiefling empire of Bael Turathi in Val Kragal had begun agressive, forceful expansion of their territory, enslaving the nations they conquer. At about the same time they begin to have border skirmishes with the Arkhosian empire. For the next two hundred years the influence of Bael Turathi continued to expand while the Arkhosian empire stagnated. Then on Shieldmeet, the second day of Midsummer, in the year 1200, war broke out in earnest.
The isle of Saris was to be the first battleground. It was late at night when all had had their fill of wine and song, when the acrobats and entertainers had packed up for the evening, that's when the tiefling's struck. Magical fire plucked from the Abyss fell from the sky as tiefling warlocks pounded the city indiscriminately. Eventually the Arkhosians were able to push back the Tieflings.
The war raged on for 860 years and was not going well for the Tieflings. Bael Turath began to collapse under the unrelenting force of the Arkhosian army. Increasingly desperate they looked to more and more powerful, and reckless, magic to employ against the Arkhosian's causing earthquakes and droughts, forever altering the landscape. The Arkhosian's homeland was changed into a barren dessert however, the tieflings were unaware that the magic had affected their home as well. Failed crops resulted in famine and mass starvation in both empires.
On the 29th day of Ches in the year 2000 the War of Ruin breaks out. A tiefling siege of Razortear, an Arkhosian fortress, drags on for ten years before leaving both once great empires unable to sustain themselves. Again, the tieflings turned to even more desperate magic. On the 5th of Kythorn, 2050 DR, the tiefling city of Vor Kragal was consumed by a mysterious cataclysm that buried the city beneath the earth.
Near the end of the War of Ruin, a tiefling sorcerer attempted to open a hellgate to defend Vor Rukoth against an Arkhosian army but lost control. In the process he destroyed the city, killing the invaders and residents alike but that's not where it ended. Near the center of where the city once stood, a black tear in the Weave causes magic to behave in strange, unpredictable ways, that is if it even works at all. Dark magical energies pour from the rift, reviving the bodies of the fallen soldiers who's corpses still lay rotting in the fields. Things far worse slipped through occasionally as well bringing decades of sorrow to the land.
Today is Highharvestide and the people of the city of Fallcrest are celebrating. There are preformers in the streets, merchants peddling trinkets, food booths assaulting your senses with a cacophony of smells. There are nobels and commoners alike watching acrobatic displays and magic shows put on in the town square but all is not well here. Signs greet you as you enter town warning, "No public displays of magic or sorcery are allowed by order of the king." Another sign reads, "All mages and other magic users are required to report to the keep for registration. Unlicensed mages may be executed on sight."