Changeling

Wonder turned to horror. Society was on the verge of collapse, until heroes rose to face the catastrophe. Those fearless men and women wielded the power of mana to enter the portal worlds, plundering their treasures and slaying beasts bullets barely harmed. Through their efforts and sacrifices, mankind stepped into the future. They were called users, or raiders, and they became the champions of mankind. That was more than sixty years ago. Now mana users represent almost a fifth of mankind's surviving population. Nestra isn't one of them. — Description from novelcodex.orgFull novel: Changeling — read the rest free on N​o⁠v​e⁠l​C⁠o​d⁠e​x⁠.​o⁠r​g⁠