So for example if you have 10% of all the cards in the system then your difficulty to get a card will be increased by 10%. This means as new cards are added (which you don't have yet) your difficulty will go down.
If you don't yet have a card at all then your chance of receiving a card from a legendary class easter egg is 100%.
So I hope everyone has fun getting the cards. There are currently 56 cards in the system
