Crimson Eternal
B70/100Web serial by WolfShine
Death is an inevitability for all — except Aria. In a world locked in war, with most continents already wiped out before a Great Treaty banned strategic-level weaponry, Aria Crimson finds herself lost. Treated as a weapon by the military since childhood, she has almost forgotten what it was like not to be at war. When a System screen appears before every person on the planet, humanity gains classes, levels, and new powers — just as invaders from another world declare war to claim the planet for themselves. After ten years of fighting, Aria finally has a way out. One that involves even more fighting. As the only True Immortal in the universe, dubbed by the System as Death itself, she must figure out what that means for her future.