Forum:More Crystals...sorry guys

Abundance and I just got a Rainbow Dragon today but wasn't able to draw/play it at all in 7 games. Anyway, here's the list:

I was thinking about scrapping the Sea Koala,Rescue Cat and one of each of the Mammoths and  Tigers for another  Diamond Dude,  Green Baboon and Rainbow Dragon and leaving one more spot open in my list for... well I don't know what. Rainbow Gravity maybe. Any help would be appreciated for sure. ~Ochabox