The Mane Event

Stave, 170 pieces. This is a five-sword teaser, and it is everything I wanted.  The best Staves have an amazing inevitability about their difficulty--you can't possibly see how it can fit together, and then when you have put a few pieces together you can't possibly see how it could be any different.  Retained its difficulty to the very end.  The symmetry is probably the biggest clue--fitting two pieces together generally indicates two other pieces should fit.  10/10 go Stave.