Great suggestions! Yes, its going to take a while to get the balance right hahaha. I like your idea of bosses having special powers to punish strategies and think that would work quite well for this game.
Edit: I've read your other posts as well. I'll be rewording the triggers you have mentioned, I agree they can cause some confusion.
Summon is not working as intended atm and summoned cards are taking up space they shouldn't. Going to rework it soon along with its explanation.
Summoned cards creating a copy of the card instead of playing it from your hand is intended.
Thanks again for the feedback! Would love to hear more after the patch.