I picked this up on a whim and really wanted to make sure to give you some kudos on putting some time and effort into the experience. I appreciate the fact that you just dump the player into a realized world - you could've phoned in the story but the Imperial Warden feels like a scary imposing figure that others are trying to thwart. I've only collected about half the cards so far but the battles get fairly crafty, requiring you to switch out kits to handle different fights. While I'm not a huge fan of some of the huge health pools on some of the fights - I understand that you sort of need that to make sure the player doesn't just get a lucky draw to win.
You've really put a lot of love and care into the game while also keeping the scope reasonable and it shows. Well done. I'm definitely going to have to check out what you're working on next.
I tried my amateurish hand at drawing the Imperial Warden on a whim - he got a little creepy looking but perhaps its perfect for Halloween. Magic of Autumn fan art!