@Hagallson I have edited your comment. Please do not mention performing anything on minors against their will. This forum is under scrutiny from a variety of people who hate its founder, and it can open the door to trouble for us.
My own limited experiences with blood that isn’t mine
I did a reversal kind of thing with this: linking my own blood to the blood of a dead relative for expansion; it has been shed on soil far away from me. I used it for protection measures that are confined to that place in question and - so far - it worked
Also offering deer blood to a spirit as part of an agreement to stop the destruction of something kinda did the trick for me. It was especially requested, so I assume that my own blood would have not sufficed.
In my personal conclusion: blood linked to a specific kind of geography or place seems to amplify protection workings.
I highly recommend Sorceress Cagliastro’s Blood Sorcery Bible, which extends this to blood taken from different parts of the body for different spells. For example blood from the finger has different energy than blood form the sole of the foot.
There’s more details info in her courses but enough discussion in the books to get the idea.