There’s a senior, Spirit, who takes more clueless first years under their wing, carefully teaching them the basics like how to speak in riddles or who to seek out and the places to avoid. It always goes the same. The first years get their moodrings, told only to look when they wont be seen looking, and Spirit turns their back and the first years, not out of suspicion but excited to try the sight out, peer at their senior only to see very literal and massive black wings encompassing them. Most run. They fear the creatures as they should. The few who stay hold the truth close to their hearts, that to run would be insulting and to insult is worse than the risk of being taken.
None of them are taken which is stranger still and the runners got a spill of bad luck, the only textbooks they could grab were the unprotected ones. Enough to make sure they know this oddity is indeed how they saw it and merciful enough to make sure they know they made a mistake.