Fullmetal Alchemist

Alchemy: the mystical power to alter the natural world; something between magic, art, and science. When two brothers, Edward and Alphonse Elric, dabbled in this power to grant their dearest wish, one of them lost an arm and a leg... and the other became nothing but a soul locked into a body of living steel. Now Edward is a agent of the government, a slave of the military-alchemical complex, using his unique powers to obey orders... even to kill. Except his powers aren't unique. The world has b