This is the first time I've done this, but once I got started, I couldn't stop. I've got seven different variations of Starlin Castro's base card. I don't really want to call it a rainbow, since the cards aren't a bunch of different colors, but I don't know how else to refer to it.
The seven I've got are:
Platinum Diamond Anniversary card
So what does that leave? A few super expensive cards that I won't go after...Canary 1/1 and Diamond Embedded 1/1 cards.
I'm very happy with the seven I've got. Take a look: