Kaodi
Legend
Maybe you guys have seen something like this before but I never have. Thought I should share it here: A translucent d10 with a tiny d10 inside of it, for rolling percentages: http://www.awesomedice.com/KPL12597BLUE . This sounds like it could be kind of amazing, though I would be interested to see it put to a rolling test to see if the result of the inside die is bounded too heavily by its initial orientation inside the bigger die.