This is the moon world, but it is not the well-known moon world. On that day, the moon fell to the earth, causing Gaia and Alaya to fall asleep, and then the world line began to become strange. The ocean disappeared, It was replaced by the barren land of steel. As the phantom species extended by Gaia's will, they were reduced to monsters. The continent changed owners, and human beings were expelled by the undead and ran to the land of steel to establish a living area. Most of the heroic spirits died, and the surviving strong ones were freed and became the kings of the Old Continent. The Holy Grail War is gone, replaced by the Holy Grail system of mass production of heroic spirits, each with a Command Spell, fighting monsters to earn money to buy treasures? The post-apocalyptic moon world, a world that was spoiled by the author.