He glanced back at their improvised magic sink. As far as he knew, no doctor had ever made such a thing before—there had never been a need. The very concept of blocking magic fields to improve healing was unheard of. It was fortunate that they'd been able to discover it in time to do some good. He could hardly credit himself with the idea; it had been Redheart who had first proposed that the creatures were allergic to magic, and Lecol had come up with the design—and the lead. You never would have thought of that on your own, he reminded himself. Maybe the copper wire, but never the lead.