There were many conundrums to be resolved, yes.

"A month at most. You don't want to see what happens then," Devin answered, folding his arms across his chest. "Every two weeks is the preferable minimum. And yes, it needs to be human. Animal blood doesn't suffice. Humanoid might be enough, but I haven't had the chance to test kedan blood. I don't see why it wouldn't work, however."