Of course Barty had lingered in the woods to watch Greyback’s transformation – as though he would have even dreamed of passing up such an opportunity. Naturally, he knew that what he was getting into was horribly, wretchedly dangerous – even if his still-experimental safe-proofing of the full moon worked, there were still the repercussions that accompanied anyone beyond Regulus and Greyback finding out what he had been up to, following a werewolf out on the night he was at his most dangerous. If anyone outside the Death Eater ranks found out, then his cover of being his father’s good, sweet, well-behaved son lost all of its credibility entirely and he would no doubt get into all manner of trouble – but if anyone inside found out… well, that had the potential to be so much worse. Barty shuddered to think of what would be in store for him if Madame and/or Mister Lestrange were to learn about what he’d done in following Greyback, but… well. Regulus could keep his mouth shut rather well, when it was important, and Barty highly doubted that Greyback was just going to run off and advertise the situation. He was bestial, Fenrir Greyback, but, as Barty had come to find out, he was no idiot. Surely, he could see all that they stood to learn from each other, and all the ways in which working together could be beneficial – and, failing that, he was sure to like having his ego stroked by having a younger kindred spirit to, in a sense, educate about the finer points of the exquisite resplendence that was murder.
As they waited for the moon to rise, Barty lingered far enough away from Greyback to observe him while simultaneously putting all of his own charms in place. Disillusionment Charm so that ‘the wolf’ wouldn’t see him, Scent-Masking Spell so that (hopefully) ‘the wolf’ wouldn’t smell him, and, of course, a Silencing Charm so that ‘the wolf’ wouldn’t hear him – of course, Greyback had only warned against scent and sight, but given what Barty intended to make of tonight, he had absolutely no interest in taking any risks. Although he wasn’t sure as to whether or not he would use them, he had a non-magical journal and a self-inking quill hidden in the inside pockets of his robes and disguised with Disillusionment Charms all their own, just in case he could manage to take notes on tonight’s events. Barty had explained it to Regulus as an observational study, and so it was – partly motivated by Barty’s genuine interest in how werewolves worked and existed, outside of the textbook descriptions of said phenomena, and in how the human portion of the werewolf’s mind could take some charge over ‘the wolf’ and influence ‘the wolf’ to do greater things; and partly motivated by Barty’s sheer, unabated desire to see such an artist as Greyback at work. From how the human Greyback had talked to him, Barty had nothing but unmitigated desire to learn by example.
When the transformation actually took place, Barty’s original plan to take notes completely dissipated as he stared on, transfixed by what he saw. True enough, he had seen diagrams and so-called “artists’ renderings” in some of his books, and he had read what said books had had to say about what went on when the human werewolf got fully in touch with his more animalistic side. What they had, it seemed, utterly failed to capture was the inherent majesty of it all – the fact that someone who was an ostensibly normal human being (or as normal a human being as Greyback was and could seem to be) was, in a matter of minutes, magically broken and reset until he was an entirely different sort of animal. Barty got so wrapped up in just staring at the now-wolfish Greyback that it seemed like there were only mere seconds in between the completion of the transformation and Greyback’s departure for the farmhouse.