I personally have a couple (No One But ME Touches The Magic Dice)
But it is one of my players who has the most...
She is a stonehand thrower. If there is a chance to screw up a roll in a game, in almost any system, she will do it
at least once a game. Blow the top off with a great roll? That only happens to other players.
So, believing that her dice were cursed, she actually took them to be ritually blessed, first by Wiccans, then by a Catholic priest.
Now she absolutely refuses to roll any dice (or even touch them) without first putting on a pair of motorcycle gloves.
It's gettin' a little weird at the table that way...