User blog comment:LegendOfUnknown/What are the odds and probability?/@comment-5428123-20130103073840

If you're planning on buying the gold pack, you are guaranteed to get at least one 100% ultra rare ticket, which will in all likelihood be a card of similar worth to Fairy Knight or Fairy Knight herself, plus you're guaranteed to get at least 50 power potions. You will also get three 15% ultra rare tickets. All this is at a bare minimum.

Best case scenario, you get two 100% ultra rare tickets which are guaranteed to give you an ultra rare above power 14, plus three 30% ultra rare tickets, and 80 power potions. Also, you get forty more cards (most of which are likely to be junk rares).

To summarize, you're pretty much guaranteed to get a decent ultra rare if you buy the gold pack. It's not a bad value considering what they give you. Even if you don't get what you want, you'll likely have enough assets after buying the pack that you can just trade for one (fairy knight seems to be going pretty cheap right now in terms of pure price).