Reborn: Playing the Pig to Eat the Tiger in Another World

What? Lu Zhan was reborn in the body of an idiot, and now he has to keep pretending to be one so everyone thinks he's perfectly ordinary? You've got to be kidding. He has the most powerful talent in this otherworld, as well as the strongest cheat... The main story revolves around galaxies and the universe, with fantasy as its vehicle, so the setup at the beginning takes a little while. It may be a slow burn.