Okay..so, I was at a yard sale and I got a lot of stuff..but, there was a bag of these Yugioh things. They are about the same size as the card, a little bigger. They are black, though I have one red one. On it are images of monsters like Oblisk the Tormentor and Blue Eyes White Dragon, and there are attacks like Dark Magician’s Hats..and, there are also characters like Pegasus. On the bottoms they have small niches..though I am not sure what they’re for. I’ve already ruled out the possibility that they are card holders. If you put them to the light they look cool and you can see the characters more clearly,,but there has to be more. Anyone have any answers for me?