Sorry I haven't written anything, I've been distracted from writing, but I should be back :)
Anyways, I thought of a fun AU!
So, Darkstalker's spell still happens but is far more devastating, similar to kings of ice, the entire royal family is gone, except before anyone arrives a new queen is named, a icewing hybrid, as icewings realize that the hybrids aren't getting affected by this odd illness. So the queen is eventually brought the news of Darkstalker's spell by the sandwings bringing the earrings, so she is quick to distribute the earrings to everyone, and she begins on her own plan. Thanks to her being a hybrid herself, she has a much easier time gaining information from other icewing hybrids, including the direct location of Darkstalker's kingdom. Of course most icewings are scared of going since the legends of any pure blooded icewings dying when flying over that area, so an army of icewing hybrids goes to Darkstalker's kingdom with full intents on just throwing Darkstalker into the bottom of the ocean so he will be constantly drowning an unable to make any further spells.