I'm not sure if this is just my luck or something, but maybe they increased the chance of getting an upped card from half-blood. I have beaten around 50 before, 0 ups, today I just wanted to see how many coins I would win and I got an upped card (quicksand)! Oh and farming with Rol/Hope deck for a week gave me a lot of the upped cards from here. One more thing, what order should I upgrade in after Shards and Supernovas?