I recommend Endless Games: Getting the Necromancer Class at the Beginning to you. This was a sci-fi-doomsday crisis novel written by Meow the Cat, where the protagonist transmigrated to a world called Endless Games, chose the Necromancer profession, and obtained skills such as summoning skeletons. In the game, he had to explore and plunder the endless world, facing all kinds of dangers and trials. I hope you like my recommendation. Muah ~