Bonisagus Acclaim & Original Spells

Ooh, I like that even better. I'd envisaged the original as sort of a temporary Arcane Connection-esque system. Once you've marked them, they're yours for a while. I envisioned magi marking their generals and sending them off to different parts of a battle-field, or getting the blood onto their foe somehow and teleporting off, letting them use Blooded range spells whilst leaving their foe stuck with an Arcane Connection they'll die before getting a chance to use.

Yours, on the other hand, is cooler.