Fullmetal Alchemist: Brotherhood

Alchemy is built on the law of Equivalent Exchange: you can't gain anything without giving up something of equal value. Edward and Alphonse Elric learn this the hardest way possible when, as young boys, they try to bring their dead mother back using forbidden alchemy. The attempt fails horribly, costing Edward his left leg and, soon after, his right arm, both of which he later replaces with mechanical automail, while Alphonse loses his entire body, his soul bound to a suit of armor by Edward's desperate last act. Years later, Edward becomes a State Alchemist known as the Fullmetal Alchemist, and the brothers travel across the nation of Amestris in search of the Philosopher's Stone, a legendary object that could restore what they lost. But the closer they get, the more they uncover a vast conspiracy tied to the military and to the stone itself, and the path to getting their bodies back grows far darker than they ever imagined. It's a rich, emotional adventure that blends sharp humor, thrilling alchemy battles, and a deep bond between brothers, with a story that asks what we owe one another and what we're willing to sacrifice.