It's reminiscent of Fullmetal Alchemist. The first attempt went completely off the rails when the writers ran out of source material and it had a very unsatisfy

It's reminiscent of Fullmetal Alchemist. The first attempt went completely off the rails when the writers ran out of source material and it had a very unsatisfying ending. However, after the manga was fully out, they re-made it as "Fullmetal Alchemist Brotherhood" and it was 10x better because the story had a cohesive and satisfying conclusion.