BLAZBLUE CALAMITY TRIGGER

Prior to the events of BlazBlue, humanity was on the verge of extinction from the "Black Beast", a creature of Darkness. The world was saved by six heroes who wielded magic. They helped humanity create "Ars Magus", a fusion of magic and technology, to defeat the Beast.

After the war, the Novus Orbis Librarium (the Library or NOL for short) was created to govern the world with the use of Ars Magus. A great deal of dissent was caused by the Library, partly due to Ars Magus' use in nearly every facet of society, and the widening socioeconomic gap between those who could and couldn't use Ars Magus. This dissent would eventually form years later into The Ikaruga Civil War, when the Ikaruga Union openly rebelled against the Library. After the war, the Library imposed a harsher rule on the world, punishing any rebellion against the Library with the death penalty.