This Is Really the Human Emperor's Flag.

Su Ming traveled through the world of immortal cultivators and became a mortal boy captured by evil cultivators. In order to protect himself, he combined the incomplete soul-calling flag production method with the scientific and technological concepts of his previous life, and used his own skin, teeth, etc. To refine a special "Human Emperor Flag". Although this flag has no direct lethality, it can swallow souls and ghosts, and feed back special energy to heal injuries, strengthen the body, and enhance the bones. The most amazing thing is that that special energy can also strengthen other items! "Although my Human Emperor's flag is emitting black smoke, it is indeed the Human Emperor's flag! If you don't believe me, you can go in and have a look!"