The Saga of Tanya the Evil Vol 14 by Carlo Zen read by Erin Rieman

None of the soldiers on the front can remember the last time they had a decent chance to eat, drink, or sleep—and yet the battle rages on. Hoping for a victory that will only prolong the end of the war, Tanya rushes to the battlefield with her mages, a faint glimmer of light in the darkness as Zettour finally lives up to his name as an enemy of the world.