Release That Witch
Cheng Yan travels through time, only to end up becoming an honorable prince in the Middle Ages of Europe. Yet this world was not quite as simple as he thought. Witches with magical powers abound, and fearsome wars between churches and kingdoms rage throughout the land. Roland, a prince regarded as hopeless by his own father and assigned to the worst fief, spends his time developing a poor and backward town into a strong and modern city, while fighting against his siblings for the throne and absolute control over the kingdom. Join Roland as he befriends and allies with witches and, through fighting and even farming, pushes back invaders from the realm of evil.
Looking at the shiny black stone on the desk, Nightingale asked, "What's this?"
"Obsidian." Roland even did not raise his head, busy with painting his blueprint.
"Ob... What?"
"No, I was talking nonsense." He sighed. Just by looking at its shape and color, how could he know what it was? After all, he was not a geologic expert, and could not guarantee to distinguish even a pure metal, to say nothing of ores. The knowledge he had in his head only told him most ores were compounds with complicated compositions and their color varied with different impurities. For example, iron ores could be divided into hematite, pyrite, and siderite, which looked totally different from each other. Especially the pyrite, which would sometimes show a light yellow metallic sheen, was often wrongly identified as gold, giving it a nickname "Fool's gold".