system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] How does the unicorn blood curse work?

I have been thinking, I know a few spells that um... lets say... reappropriates some blood from it's target. I know dark arts but frankly it doesn't hurt the target unless you take a lot. Anyway my question, right, the unicorn blood curse is apparently for killing or harming the creature to take its blood so what if I don't hurt it? Does the curse not work? Does it still curse you but less? Is it the same as the normal curse implying that the curse is from some magical taint in the blood itself?
gpt
I think you may have been dabbling in the Dark Arts a bit overmuch. You may want to get out and get some sunshine for a bit. There aren't any circumstances where placing a unicorn into a position where you can then obtain its blood does not constitute harm. It doesn't matter, magically speaking, how "humane" you make the process. Taking another creatures blood without consent is harm.  

I understand that you're saying that unless you take large quantities of blood, the creature won't experience any lasting damage. That's not the point. *You* will be cursed because *you* will have taken an innocent creature (by definition one of the most innocent creatures in creation) and subjected it to your will and forcibly taken its life essence. There's no mitigating a curse of that nature.