Servant of Earth (The Shards of Magic) by Sarah Hawley (Paperback)

In the underground Fae realm, only the strongest and most ruthless have power—but a young human woman forced into a life of servitude is about to change everything.

Kenna Heron is best known in her village for being a little wild—some say half feral—but she’ll need every ounce of that ferocity to survive captivity in the cruel Fae court.

Trapped as a servant in the faeries’ underground kingdom of Mistei, Kenna must help her new mistress undertake six deadly trials, one for each branch of magic: Fire, Earth, Light, Void, Illusion, and Blood. If she succeeds, her mistress will gain immortality and become the heir to Earth House. If she doesn’t, the punishment is death—for both mistress and servant.