Half-Phantom Crown

Spectra Phantom, a twenty-five-year-old half-phantom queen, has kept her icy kingdom of Silvermist peaceful for years - until a mysterious illness strikes a visiting family and a rare stabilizer crystal forces her into the dangerous echo-charged caves. When the caves mark her with ancient magic that begins to change her from the inside out, Spectra becomes the center of a prophecy she never asked for.
As childhood loyalties, new feelings, and rising threats collide, the caves awaken - calling her, claiming her, and unraveling everything she thought she knew about her power, her heart, and her destiny. To save her kingdom, Spectra must face the magic that chose her. before it consumes her completely.