I like this one, nice lead in, fun plot-going to planet with that kind of write up will certainly get the PCs interested-classic drama, not a lot of character details but that just makes things more flexable and there is actually a lot detail here.
The only I would ask for would be a little more description of the Sneel themselves and what their home world might look and feel like.
I like the idea of mystical dancers roaming the country side of the fringe of society, it has very celtic-fairy-folk feel about it. But for all the stuff you have going here, you fail develop any of it. The narrative and the idea have no personality other broad strokes of victim and predator. Also, the Staff of Destiny, even in a short narrative such as yours, I feel a little cheated when a proper noun item turns that turns out to be game changer was only mentioned asides.