Trying to Turn Moonlight into a Sword

My name is Mingshu. I have lived an ordinary life for seventeen years, but I know that I am not ordinary. When I was six years old, an old immortal who escaped from the hospital promised me the magic of turning moonlight into a sword, as a gift from heaven. And tomorrow is my eighteenth birthday. I looked at the crimson moon indifferently and made the call... "Will you come to have hot pot tomorrow night?" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.