There are monsters and shadows outside, and I'm so scared. I just want to stay in the safe house until the end of time... Unkillable shadows and endless monsters, Yu Hong came here with a mysterious black mark. Using the black mark that can strengthen everything, he slowly built his own absolutely safe area in his safe house. As everyone has voted, this book is about the weird fusion of immortality and extreme Taoism, and Lao Gun does what he says.