Topic: Track which decks utilize cards in inventory
The main problem I have in regards to inventory management is figuring out which of my decks are utilizing one of my limited number of cards. For example, I know my Tundras and Flooded Strands are split up amongst my 5 decks that run white and blue, but how many and in which? Other cards this would be a boon with are artifact accelerants, search cards, and other utility cards that need to be assigned and used efficiently.
So if someone needed to co-opt a Demonic Tutor for a new deck, they can see where and how they are currently utilized, and be able to decide where to substitute a Diabolic Tutor.
I think the best way to implement this would be an action on the card in the inventory that would lead to a page showing which decks have it and how many.