"Again, large world, not many purebloods, even less rich purebloods. The chances of that happening are very minimal. If you want, I can sit and calculate them," he said with a grin.
He shook his head. "He couldn't have made it blood specific, because he had someone with her and it's very likely that the someone was a pureblood. Besides, the spell works on Allison and she's a Muggle. No, way too many complications in your explanation. Occam's razor, simplest explanation usually is the right one. The spell was created to affect James, but putting a name to a spell would be hard, so you use the intent. The spell would attack only a person with the intent of rescuing her. The spell would attack one person, except three showed up with the same intent, and it gets diluted." He grinned at Azriel. "And he's not a pureblood."
He snorted, but kissed Azriel again. "I'm hot all the times, but thank you, and now I have to start researching intent based spells."