Shifter are a group of were animals. Such as Werewolves, WereLeopards, anything you can say with Were in it. If you'd like to join please just say what animal you're gonna be. You can get very creative with this. You can even say WereSwan.
The Shifters are very vicous and don't get along well with the other two groups. They're mostly out for blood and fights. They live in packs kinda like wolves.