"We've slowly been learning how to make our own spells," Neville explained as Luna and Hermione broke their embrace. "I remembered what you told me about some of the spells he put on that ring. We've done loads of research but couldn't find much that would help us—I don't know how he got hold of those spells. They're either banned now (and with good reason) or he made them himself. I wanted to create a ward or shield or something to nullify some of those, so that if we could find you again, he wouldn't be able to track you. It isn't permanent, but it's a start."