This was fun to read. Your Mulciber Murphy made me laugh with his bumbling act. A wonderful original character! His sense of logic was hilarious and quite irresistible as he tried to explain things to a doubtful Snape:
“Shouldn’t you have been sure what we wanted before casting the spell?” Snape asked, eyes narrowed. “Hm. Well, yes, I suppose, although this is just as good,” Mulciber declared blithely, closing his book. “One is ‘bonding two together’ and the other is ‘two guarding each other’, so it all works out. One of my better bondings if I do say so myself.” Mulciber was smiling up at them. “Congratulations!”