Blood magic was ported to 1.12, but I'm not sure if there have been any real changes to the mod since 1.10. The textures can maybe be directly ported from 1.10 to 1.12 then? I'm not very knowledgable about building these packs.

Blood magic has been ported. If there are still missing textures, we're welcoming PR's or .zips! See #46 for future requests.