I've Already Turned a Dragon into a Demon, so Why Should I Become an Immortal?

[Plot][Investigation][Reasoning][High IQ][Reversal][Special training system] Ten thousand years ago, Lin Jianzhi painted three paintings and raised a tank of fish. When he woke up ten thousand years later, he was still the same simulated portraitist, but things had changed and everything had changed. At first, he really just wanted to live, but he was forced to start his own business. Monsters causing troubles, strange murders, plots and plots... He takes care of every step. But as the truth of one case after another emerged, Lin Jian became numb. The strange massacre occurred because of a strange demonic stone. The turmoil in the court situation arose because of a bloody flag! The serial mutilation case happened because of a fish... Many ghost cases are caused by a few paintings... …… Finally, Lin Jianzhi picked up the pen and painted, muttering to himself. "Who would have thought that those demonic stones are goose eggs in the fish tank, that blood flag is a banner stained with my blood, and I have obviously eaten that fish... Why did those three paintings run away?" It was just now that he discovered that he could actually draw a dragon to become a monster, and a tiger to become a saint. The real terror was himself. What kind of immortality could he be?