Iron Curtain Galaxy

There is a rare mineral called "Star Marrow" in this world. It is not only the energy source that drives precision machinery (such as early mechanical skills, powerful ballistae), but it can also be guided by a very small number of talented people through spiritual power to produce "spell"-like effects (such as strengthening weapons, affecting the weather, spying on the mind, etc.). Those who master the technology and resources of "Star Essence" have the power to change the world structure.