A good start. The biggest change needed is the ability to popout the extension window. I'd also like the card images to be bigger in the list page and much bigger when selected. Perhaps a dedicated zoom feature to see the small details on the cards. The current small image sizes is just not very usable. The only other missing thing is a way to change powers but being able to do pretty much everything else is great. The interface is clean and I appreciate the dark theme though I believe it should be even darker with a base color of true black.