Coming to a Strange World, I Am the Demon Moon Curse Blue

The erosion of hell never stops, constantly depriving the demons of their wisdom and strength, turning them into walking zombies. The door to the human world is permanently closed, and there is no way out. The seven demons sacrificed their origins and helped eldest brother Curlan open the door to another world. However, the place where the cursed blue comes is not the human world, but a world called "Weird". It wasn't until he stepped into those terrifying dungeons full of unknowns that Curlan was pleasantly surprised to discover that every time he cleared a level, he could regain his origin and wisdom that had been devoured by hell! So, in those scary worlds that ordinary people avoid, an elegant demon who is out of place appears. Many years later, facing an SSS-level copy, Curse Blue's scarlet eyes were half-squinted, and his voice was mellow and magnetic: "Let you see... What is the gravity control of a black hole by rubbing it with your hands."