The Ultimate Screw-Up System: Big Brother, Don't Kill Me!

I haven't even wiped my butt yet, and you're already making me transmigrate?

Me: "It's a rule of the martial world: when two nations are at war, you don't kill their envoy!"

System: "Are you an idiot? They're the enemy nation. Kill as many as you can!"

Me: "Then who's going to dare deliver messages?"

System: "Just guess what the other side is thinking!"

What am I supposed to do after awakening the most useless System for Hosts? Asking online. This is urgent!

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.