Global Demon, Get the Death Knife at the Beginning

Thirty years ago, twelve black holes appeared in the sky, and countless demons fell out of them. In order to survive, humans sign a contract with a black hole and can summon a monster inside to fight. But Mo Bai summoned a Tang Dao. Please don't let me act independently just because I am a time traveler. I will be scared, okay? But he didn't expect that this knife was actually the nemesis of all demons and humans. What about the strongest defense? My magic blade is no different from cutting you into tofu. What about the strongest attack? My attribute bonus makes it impossible for you to even hit the corners of my clothes. The humble author asks for collection, support, flowers, thank you for your support This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.