system
Given the following post, respond as if you're commenting on Reddit:
human
[General Fantasy] So, I'm in the market for a new sword, and I've heard that you can make a sword from the iron in the blood of men. Is a blood iron blade worth it? What special properties would a sword like that have?
gpt
It would be an absurdly expensive sword due to the extreme amount of people you would need to get blood from, then seperate the iron from their blood, then melt into iron to turn into a weapon.

It would have the property of making a lot of people, nay, countries especially angry with you for commiting genocide for the sake of a sword. That's it.