Force choke. Force lightning. These are but a few of the more well-known Dark Side powers. Lesser known? Force transforming-into-an-egg, one of the many more obscure Sith tricks Vader never quite found a good excuse to use in any of the films.
The new toys inexplicable egg-transforming toys, leaked by Toy People, are expected to come out March of this year. They'll also come in flavors in addition to Darth Vader (maybe this isn't a Dark Side trick after all). There's an R2D2, a stormtrooper, and a C-3PO not the most obvious transformer: Ball droid. Maybe that was too easy. [Toy People]