Ashen Frontiers is my own setting, and this free booklet provides an explanation of the world, why it is called 'Ashen' frontiers (The Tyrant rose to power by discovering/reinventing a way to convert Primal energy into Arcane, creating corruptive Ash in the process), and the peoples, places, perils, and possibilities of the setting.

https://www.drivethrurpg.com/product/442192