Thralls are a slave soldier race in an Earthlike universe, where biological magic takes the place of technology. Centuries ago, desperate humans volunteered themselves to be transformed as soldiers for the Poison War. Today their descendants are still soldiers and laborers. In contract law they are 'corporate wards'; slaves owned largely by arms dealers.

Dally Harper starts this story as a champion thrall fighter. He is one of the 'lucky' ones. It's all downhill from there.

The Loyal Ones is a worldbuilding project with art, lore and writing. You can see more here.