Quote Originally Posted by JayCommon View Post
1 star cards are unlimited right from the start.

2 star cards become unlimited as soon as you collect 30 unique cards.

3 star cards become unlimited as soon as you collect 60 unique cards.

Just in case you didn't know. Your deck will open up for better possibilities you just have to work at it. As of this patch, however, you will never be able to have more than 1 4 or 5 star card in your deck at any time. But it has to be like this, because when tournament play comes around there won't be healthy competition if everyone has decks stacked with 5 5star cards lol.
There are a good many rules that would balance high value decks. The easiest to beat NPCs actually have some of the(if not -the) best decks around.