Re: Random roll needed
In our old group, one of the guys who GMed had "The Marble."
It was a much used D20, with edges eroding, that was working its way toward being spherical. Once rolled, it would kind of meander, and take a bit longer to come to a stop, than a young, healthy D20 does.
It seemed to prefer 19, 18, 13(always nice for effect, when it just barely hits or misses) 6, 4, and 1. And 00. Which was funny...as it did not come up 10 or 20 too often.
Everyone dreaded that die coming out! Usually near the end of the game, almost always during some crisis. Didn't natter if you needed high or low. It was very good at serving what you didn't want.
Sometimes, in nightmares, I see that die rising in a Halloween sky, like some macabre bad-moon.