Six(!) extremely rare transparant Darth Vader mini figurines made by Lego. Normally only available to certain Lego employees. You can find some sold seperately (watch out for fakes), but never a set like this!

Comes in a special display case. More pictures available at request.

More info: https://www.brickhello.com/post/transparent-darth-vader-lego-minifigure