He was pleased with himself. So many questions and worries swirled around in Hermione's mind at his announcement. What had he heard from the others that had similar mirrors? She still didn't even know how many existed or who held them. Draco might've been able to give all sorts of information to the wrong people if that was the case. And, if he could listen in, who else had figured out the same spell? She needed to find Antonin or Thorfinn to warn them that the mirrors weren't secure. All it would take was one person hearing the wrong statement and they would all be in severe trouble.