system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Are there ways to use unicorn blood without the negative side effects?

Let's say that I find a unicorn, and feed it something laced with either drugs or some kind of potion to make it go to sleep. I then take a syringe with a needle to extract some blood (not too much, don't want to kill it). After an hour or so, the unicorn wakes up and goes about it's day like normal. Will this work, or will the blood still curse me? 

And if this doesn't work, are there other methods to get unicorn blood without the negative side effects?
gpt
Yes, although you wouldn't get its life extending properties either. It's all tied to the act of killing the unicorn, taking its life in a literal sense.

There is in fact a market for humanely extracted unicorn blood. It's a very expensive potion ingredient.