Multiple decks open at once.

Allow to have multiple decklists open at once. Seperated like how different boards are. This would be awesome for managing decks built in paper and moving cards owned between decks. Alternatively have favourited (or some sort of tag) decks appear on homepage.

Even if this were a Desktop-Only feature it would be really handy!

Perhaps the user doesn’t need to be able to open multiple decks at one time, just one in each open window, but the UI could sense the drag and drop from one deck to the other.

The next level utility would be if when doing this it would ask “move or copy?” to just add (copy) the card to the second deck like a scryfall drag-drop, or (move) also remove it from the first deck to better represent the user’s physical collection.

The icing on the cake would be if when moving a card between decks if the now-empty slot now left a “ghost” of the card with a note “currently in <deckname>!