Hello everyone, I count on you to find this novel as I searched for it without success in the past years. Here is what I remember of the story : -> MC comes from our actual Earth, but he is the descendant of a family of scientists that live deep in the ocean and are at the peak of technology because they have a way to give their memory to their children. Hence, he has a particular body : ultra-strong, and no heart : his veins alone can make the blood circulate. -> He is considered a failure because as he possess no heart, he's got no emotions. He leaves and wreak havoc on Earth, before being caught by authorities. They kill him with an electric chair but he was transported in another world at the same time : he is basically dead as he arrives but is revived as an undead. -> He was summoned as a hero, because the previously summod heroes betrayed the human empire after killing the demon lord as usual. -> Like the other heroes, he is given a special skill : for instance, it is a kind of shop that only he can see and in which he can buy anything. -> He is send with a grand priestress to kill the rebellous heroes. If I remember well, the novel is korean and finished with something like 250 chapters. I hope you can help me, it really was a refreshing novel in how the story evolves, and the end particularly is amazing.