I cannot imagine a world of magic from blood is a particularly welcoming first impression either. [especially just how much blood. even ignoring the blisters, which were hard to ignore.]

That is a wise way of handling it, I believe. At the very least this omen business is easy enough to master, and helpful besides. Now that is very much a magic I have never heard of before, even in old tales of it. Creating another being? Terribly odd.