「Demon Suppression Gate」
What greeted his eyes was a great city of steel. Yu Fei had seen information on the Abyss and the Demon Suppression Gate in his general studies class.
The Border-Realms varied in size, and the Abyss was among the top five. This was also the main battlefield where humanity fought the Yuan-Demon race.
The Abyss was vast, its area larger than the mother planet's. The average level of heaven-and-earth primordial energy was 12, with some regions reaching as high as 20, far surpassing the environment of the mother planet.
Various resource sites were widespread here, primarily minerals. Among them, Red Sulfur Powder—the main material for super-powered bullets—was available in vast reserves in the Abyss.
In addition, large areas in the Abyss had been developed for cultivation, all of which grew extraordinary crops, making it a crucial Border-Realm that humanity could not afford to abandon.
