Yeah, choosing the different gates allows for different additions [attack cards, passive cards, boon cards]. I thought the tutorial would be clear enough on which gate adds what , but I'll add an extra line for each in the tutorial, and maybe some flashing lights to really drive the point home
passive cards being a bother was the first bit of feedback I got, and I'm already working on a fix. I definitely took for granted my ability to identify cards at a glance.
in hindsight, using multiple cards at once *does* only make only one card play, because the cards can be used at any time or rate while their abilities are only activated at the end of the card use animation. frankly I'm surprised I overlooked that, fixing it is now on my todo list