Don't Mess With This Mage Sister

Northern commander Ella suffers a cursed grave injury after sealing the Demon Realm Rift. She travels to the capital for Moon‑Spring treatment but is harmed by her brother's girlfriend Vivian and Damon, leaving permanent damage to her right hand. Going undercover as an ordinary maintenance worker inside the Arcane Tower, she collects evidence of their defective military crystal racket. She exposes the plot and brings villains to justice at the anniversary celebration...