I Started with a Poor Physique, and I Managed to Become the Ancestor of All Ghosts.

A game otaku was struck into the world of immortality by a bolt of lightning on a thunderstorm day. He found that he had become the character in the game, the ancestor of ghosts. It has five brains and seven hearts, can regenerate infinitely, but cannot see the sun; He has vampire magic and can create dependents, but he can't suppress his bloodthirsty desire. Cultivation is as slow as a turtle, and the only advantage is that the life is hard enough. What's even worse is that he seems to be targeted by God. How can such a monster, neither human nor ghost, survive in the world of immortality where the weak eat the strong? They stay in bed during the day and come out at night, just to survive. Don't seek to get ahead, just don't be stuffed into the alchemy furnace.