I came up with an idea to save some time. (Note: This is when you are adding cards to your deck outside of a battle)
When you accidentally remove a card in your deck, there should be a button, such as Right Click, to instantly add another card to the deck. Let's say you accidentally removed a tower shield when arranging your deck. Instead of having to go through your entire list of cards, how about you can just right-click another tower shield card in your deck to add another one.
This would save a lot of frustration to players trying to find a card in their spell list.
