Gates of Hell: the Road to Godhood with Gunpowder and Sword

In the late Middle Ages, the Holy Empire was slowly approaching the brink of collapse amid years of war. At a time when the Empire was in turmoil, at a place on the border called Stone Core Castle, an ambitious lord used a bloody ritual to open a forbidden path to becoming a god. Trolls, orcs, and lichs, these monsters only recorded in myths, also crawled along the gate of hell to this wind and rainy land, and brought with them the "Ether Stone", the most legendary alchemy that can make people immortal. Ancient secrets, sealing rituals, thrones of gods, everything is hidden in the dungeon of Stone Core Castle, but the fate of this land is finally handed over to a down-and-out nobleman named David. How will he rebuild the territory, build an army, use flesh and blood, wisdom, guns and swords to open this road of no return to high-dimensional space? The fate of the empire, the road to becoming a god, the love and hatred of the knights, everything will be revealed at the end of the day.