20 After the hubbub around the injured girl ended and she was left to recover at the infirmary, two men came in. The first entered through the front door, with a nod to the guard. The second came under the cover of darkness, slipping through the window the first man opened. "I told you it wouldn't work," the second man said, nodding at the girl. "It can't work with impure blood. Only ancient blood, even diluted, can be improved." The first man frowned slightly. He wasn't one of the so-called ancient blood, and he didn't like the implication of his inferiority. Especially not coming from the second man. "I don't think that's it…" he said. "This girl grew up in this world. The other one grew up in a magically isolated one. We saw it in our calculations. Not having energy makes the syste

