One day a godlike voice announced to the world of an update to the Universe itself, warning of various catastrophes. Over the course of the day, the world was filled with magic, triggering apocalypic changes to the world.
Civilizations were torn asunder, scattered to all corners of the globe, and the people inhabiting Earth were forced to survive and rebuild as the world's geography was thrown into disarray. However, the magic which has imbued itself within the world, also empowered various creatures which inhabit the world. Monstrous beings were born, and in no time at all the human population dropped. With most of their weapons and tools out of reach, and their livelihoods destroyed, the survivors labored for generations to rebuild what was lost.