Fullmetal Alchemist

When two young brothers attempt to bring their dead mother back using alchemy, it goes horribly wrong — one loses an arm and a leg, the other loses his entire body and ends up as a soul trapped in a suit of armor. That's the first episode. Edward Elric, the older brother, gets fitted with mechanical prosthetics and becomes a State Alchemist at age twelve, earning the title 'Fullmetal Alchemist.' From there, he and Alphonse set out across the country of Amestris searching for the Philosopher's Stone, hoping it can restore what they lost. The world runs on alchemy governed by the Law of Equivalent Exchange — you can't get something without giving something of equal value — and the show takes that rule seriously, both as a power system and as a theme that runs through everything. There's military politics, morally gray characters, and consequences that actually stick. Studio Bones brought their A-game to the animation, and the soundtrack genuinely elevates the emotional moments without feeling manipulative. It's 51 episodes from 2003, and it carves its own path separate from the manga partway through, which gives it a distinct identity. If you liked D.Gray-man's blend of dark fantasy and brotherhood, or Soul Eater's stylish action with real emotional weight, this is in that same lane but with tighter world-building. It's action-packed when it needs to be and genuinely heartbreaking when it wants to be. The balance between the two is what makes it land.