This is ridiculous. I have done Tamulus at least 40 times and gotten no fire deck. i have however gotten the life deck a bunch and random stuff. This is crazy. i have also done Sun Darkling about 15 times and also gotten every deck of shadows, but the fire one. Something needs to be done about this because this is ridiculous.
I feel your pain, brah. In Azteca, I just could not get the extra health decks for my school. I got Cipactli's Lost Cards (and maybe a Lords of Night Pyramid Deck), but very few. I also got 5 Storm Sun decks. Go figure.