Fantasy: Don't Force Me to Use My Sword, Otherwise the World Will Be Destroyed

I have a sword called Mie Shi. Once I am angered, I will kill people until my head goes numb, because I can't stop until I kill Mie Shi! I also have a sister. What she likes to do most is to force her opponent with a sword: Call me, call more people, preferably all of them, so that I can kill them! I also have a younger sister who usually has a seal attached to her dantian. Once she opens a world, her spiritual energy will be absorbed by her instantly, and she will destroy the entire world without leaving any trace behind! I also have a fiancée, the kind who is so beautiful that she will bring disaster to the country and its people, and destroy the country and its species, but she always thinks that she is a man and fucks more of her women than mine! Really have a headache... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.