I am going to nominate 2 books, although I am not sure they both qualify. The 2nd book is definitely not fantasy but as got excellent reviews, so I thought I would throw it in.
A masterful, twisted tale of ambition, jealousy, betrayal, and superpowers, set in a near-future world.
Victor and Eli started out as college roommates—brilliant, arrogant, lonely boys who recognized the same sharpness and ambition in each other. In their senior year, a shared research interest in adrenaline, near-death experiences, and seemingly supernatural events reveals an intriguing possibility: that under the right conditions, someone could develop extraordinary abilities. But when their thesis moves from the academic to the experimental, things go horribly wrong. Ten years later, Victor breaks out of prison, determined to catch up to his old friend (now foe), aided by a young girl whose reserved nature obscures a stunning ability. Meanwhile, Eli is on a mission to eradicate every other super-powered person that he can find—aside from his sidekick, an enigmatic woman with an unbreakable will. Armed with terrible power on both sides, driven by the memory of betrayal and loss, the archnemeses have set a course for revenge—but who will be left alive at the end?
In Vicious, V. E. Schwab brings to life a gritty comic-book-style world in vivid prose: a world where gaining superpowers doesn’t automatically lead to heroism, and a time when allegiances are called into question.
In a country ruled by fear, no one is innocent.
Stalin's Soviet Union is an official paradise, where citizens live free from crime and fear only one thing: the all-powerful state. Defending this system is idealistic security officer Leo Demidov, a war hero who believes in the iron fist of the law, but when a murderer starts to kill at will and Leo dares to investigate, the State's obedient servant finds himself demoted and exiled. Now, with only his wife at his side, Leo must fight to uncover shocking truths about a killer--and a country where "crime" doesn't exist.