Native Isekai Defense

Native Isekai Defense takes place in a world called Lumina. Hundreds of years ago, those who called themselves the Progenitors introduced themselves on the world stage. With armies of monsters under their command, the world of Lumina was plunged into an endless great war. Centuries passed, the Progenitors and their monster armies managed to conquer and contaminate one-third of the world.However, hope was not yet lost. The genius alchemist, Ariel, succeeded in creating the Ethereal Nexus, an arti...