The one thing that stuck with me after reading 'Black Chain' is how it flips the typical power fantasy on its head. It's set in a brutally stratified world where magic is controlled by a central aristocracy through these arcane chains that bind power, and the protagonist is a 'Mule'—someone who carries this bound magic for the elite without being able to use it himself. He's literally a conduit, a piece of infrastructure.
But the plot kicks off not with a grand rebellion, but with a quiet, horrifying discovery: the chains are sentient, and they're dying. The magic is actually a parasitic force, and the ruling class has been sacrificing 'Mules' to keep it fed. The main character doesn't want to overthrow the system at first; he just wants to survive and maybe save the few people he cares about. The tension comes from him navigating this decaying, predatory hierarchy, trying to understand the true nature of the chains while everyone else thinks he's just a tool. It's less a hero's journey and more a desperate salvage operation in a collapsing world.
Honestly, the climax where he has to choose between severing the chain and killing the magic entirely—which would destroy society—or finding a way to symbiotically coexist, is what makes it memorable. The plot is grim but weirdly hopeful in its own way.