Doomsday Summoning: Steel Dawn

In 2073, the “Red Mist Catastrophe” erupted. A mysterious red mist swept across the globe, transforming half of humanity into bloodthirsty “Rotbeasts.” The rest of humanity took refuge in “safe zones,” struggling to survive. The old world's technology collapsed, and the few remaining “energy crystals” became the most vital resource, powering defensive fortifications and special abilities.