Kazimeriz's qilin patronus came lumbering up, the silver misty creature blowing silver smoke.

It spoke to Professor Lupa:

"Good afternoon, Alessia. I am taking several of your snakelets to the Room of Requirement. It seems that they have a taste for pretending to darkness... and I intend that they learn what truly entails. As their Head of House, I urge you to join us immediately. I am not in the best of moods." The ominous statement delivered, the qilin disappeared.