A woman who suffered from frail health all her life awakens in another world. She finds herself no longer burdened by her frailty, but she also finds that she may no longer be Human at all. Instead, she finds herself as the leader of her favorite faction from her favorite game: The Demon King of the Evil-Aligned Runeterria. The Monsters of Runeterria praise her as their leader, believing that she will once more lead them to victory in this new world that is nothing like the one she left and barely like the one she knows from the game. And the rules of this game are far different any before, and even this new reality is only so familiar to her. Holding onto whatever she recognizes, The Demon King follows the four great Xs: Xplore, Xpand, Xploit, and Xterminate, raising up the Evil Kingdom of Runeterria and her monstrous subjects. As she does, she is torn between the warring virtues and vices from the vestiges of her Humanity, and the single-minded thirst for conquest and ruin that comes from her will as The Demon King. [participant in the Royal Road Writathon challenge]