unwanted treasure cards you get so many and then you can,t get rid of them they shud be about to be thrown away or eaten by pet to be able to get rid of them
Sell them in the Bazaar. If they can't be sold, right click and destroy them or trade them people in the commons. If you are too full of gold to sell, buy something then sell it to free up space. There are also always people around the Bazaar and Arena who will take cards.
