Discussion: Yu Yu Hakusho Maze Cards (Meiro Cards)

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.

 

In addition to these, there are two more Yuusuke only prisms, so there are a total of 7 confirmed prisms. This is an odd number, so I'd expect there are 10.  No proof, though.