The brain.
This was the most ambitious project that Chen Ze had ever proposed, and this was also the crux of all the problems in his world. If only he didn't think of something so crazy like this, there would be no apocalypse in his old world, and maybe, right now, he would live a simple life with a wife and probably two children, quarreling over who washed the dishes and who did the laundry. Unfortunately, there were no what-ifs in the world, and no matter how painful it was, Chen Ze couldn't go back to the past and fix his mistake.
Well, maybe, because he himself still didn't know whether the crow man was honest or not with his promise to the winner of the battle royale game.
