I found these in Australia: A set of six six-sided dice, black with yellow markings. The dice are identical. The sides are the numerals 1, 2, and 3; an unfilled pip and a filled pip; and a weird tentacle thing. (From different angles the tentacle thing looks like a witch's hat or a pitcher plant.) There's a certain gothic flair to the forms of the numerals: The "1" doesn't have a flat bottom, for example.
These are third-hand dice, so it's hard to say whether they're separated from other game pieces or somehow constitute an entire game on their own.