The War
Fonons - Essential components of all matter on the planet Auldrant. Ages ago, a new type of fonon was discovered --- The Seventh Fonon. Its discovery threw humanity into Chaos, for if one could use the Seventh Fonon, one could learn the Future. Wars raged across the lands for countless years, only ending when the Miasma - a poison from within the planet - covered the entire world.
This is when Yulia appeared.
A fonist, skilled in prophecy, Yulia saw thousands of years into the future and foresaw a way to seal away the Miasma. With the guidance of her Prophecies, humanity sealed away the Miasma deep within the planet.