[quote=@Trollbear]
question: does it have to be from one of the aforementioned tribes? I would have to do some digging to be more comfortable with either, but an generally familiar with the over-arcing lore. More personally familiar with a few others (Uktena, Striders, and some Get to name a few). 
[/quote]

That depends on ideas and what those tribes have to offer. I included Silver Fangs and Shadow Lords because it's makes most sense in political scheme of things.