Under the mentorship of Marshal Ashlynn d’Elyse, Gastone Crosse has begun to reach his potential and fights alongside the other determined warriors of the Llaelese Resistance. Yet he struggles to control the weapon that first unlocked his warcaster ability. A survivor with a proven knack for battlefield improvisation, few who fight alongside him know of the darkness weighing on his conscience, as the soul of every foe he kills is consumed to strengthen him.