Daughter of No Worlds

Why these tropes fit

A resilient former slave with a spark of magic infiltrates the world's most powerful Wielder order through an apprenticeship under a brooding, war-scarred fire mage who despises the very institution she's trying to join. Their slow-burn attraction is complicated by his buried bloody past, the Orders' cryptic agenda, and a looming war. As she gambles in their deadly trials to rescue a friend left behind in slavery, she must weigh the cost of wielding forbidden death magic against the chance to save those she loves, with her heart caught in the balance.

Evidence from the source

• High Fantasy: “the Orders, the most powerful organizations of magic Wielders in the world” source
• Strong Heroine: “Ripped from a forgotten homeland as a child, Tisaanah learned how to survive with nothing but a sharp wit and a touch of magic.” source
• Tortured Hero: “A reclusive warrior who no longer believes it exists.” source
• Quest: “Desperate to save the best friend she left behind, Tisaanah journeys to the Orders” source
• Magic Academy: “To join their ranks, she must complete an apprenticeship with Maxantarius Farlione, a handsome and reclusive fire wielder who despises the Orders.” source
• Sacrifice: “Even if it means sacrificing her heart. Even if it means wielding death itself.” source
• Slow Burn: “But even more dangerous are her growing feelings for Maxantarius.” source
• Forbidden Love: “Even if it means sacrificing her heart.” source

Metadata source: Open Library. Quotes are used only to verify the tags.