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This is a world where everyone uses breathing swordsmanship. As a time traveler, Su Fan awakened the breath of blood before dying. However, this breathing method was rated by the Demon Slayer Headquarters as the most rubbish among D-level techniques. [Breath of Blood] uses "your own blood as fuel and at the cost of life" to explode extreme combat power. Because it requires a huge amount of blood, it is only suitable for those with "thin-blood constitution". Users often die due to blood loss or backlash after the peak battle. It is a desperate style that exchanges life for victory. Can you only use a trick once in your life? You will die if you use it up! ... In Infinite City, Su Fan fought with Shangxuan level ghosts. Ghost King: Su Fan! Become a ghost! Becoming a ghost can squander blood at will! Ghost Emperor: Strictly speaking, you are also a ghost. We should not kill each other. Ghost Fairy: I haven't killed the Blood Pillar yet, you are the first! When Su Fan faced thousands of ghosts, his three words shocked the ghost world! "What's fun?" "Where's the fun?" "What do you think of human life!"

A world where demons are rampant creates miserable creatures. To this end, the country restarted Research Institute No. 749, A special institution for supernatural phenomena, to recruit all kinds of capable people. Join 749 rounds and try your best to conquer the monsters instead of killing them wantonly. But Liu Yun did the opposite. If you don't kill a demon when you encounter one, what's the difference between this and the Holy Mother? ... "No, buddy, everyone is practicing Taoism. How about you start with Immortality?" Taoism is used to kill demons. The Immortal Law is used to kill immortals! Haven't you ever doubted that immortals are cultivated by demons?