Unfortunately, it looks like you have to farm a boss or bosses to try and get the card to drop for you. I would suggest looking it up on the wizard101central.com and look it up their Wiki to find out the best places to farm for it.
You may see one or two here and there of the Savage Paw cards in the Bazaar, but it's one of those things that are extremely rare to find.
Thanks, I was just making sure the Wiki was right. I farmed the life guy that drops it in Pitch Black Lake yesterday for like five times without luck and the Savage Paw guy in Twin Giants for like 8 with similar unluckiness. So it is auctionable at the bazaar?