Greg had never been the quickest of thinkers and that combined with his lack of sleep and dire need for coffee had him staring at Ari blankly for a moment as the idea percolated into his head and settled into a shape that made sense. And it was... a kind of amusing idea. He remembered someone had done that the Umbridge when she'd been Headmistress. Umbridge had liked wearing shiny rings and he'd heard that the nifflers had gone straight for them with all the enthusiasm the species was know for.
"Uh, I don't usually do Nifflers until after Christams but that doesn't mean..." He paused and scrubbed his face with one hand. "Can I get some coffee first?" he asked plaintively. "You know, before we start plotting mayhem? I was up all night with one of the unicorn mares who was foaling and I really, really need some coffee before I can start thinking."