Black Watch of the War of Resistance

I am a bookworm of 78 or 8 years old, and I want to write a book that suits my taste. I don't know the writing style, so I will try my best to write it well! Parallel world, different history When we hunt, we kill. No one is safe and nothing is sacred. We are Blackwatch. We are the last line of defense. We will burn ourselves to hold this final boundary. This is also the last line of defense that must be defended. We are the ones watching the light in the darkness. Please bury us in darkness when we die. We never regret it! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.