I'm collecting information right now on Yu Yu Hakusho Maze Cards (Meiro Cards). These were some kind of game, released in PP packs. Of course, unnumbered.
There are definitely 20 regular cards. I can't find any solid information on how many total prisms there are.
Four are pictured below (Hie w/ sword, Suzaku, Hie, Yuusuke & Hie)
The picture below shows one more prism with a blue tiger creature/person.