魔鉱戦列, Makou Senretsu

With the discovery of a mysterious ore known as "Magestone", human civilization advanced at a dramatic pace—ushering in the era of the "Magestone Revolution." As the militaristic empire of Luma launches an invasion of its neighbor Eano, a young girl named Mare, who works in a remote mining village, finds herself unwillingly caught in the throes of war... A tale of war, fate, and survival in a world transformed by magic-infused technology.