The ambition of your game is crazy. I would have never dare entering a game jam with the idea of doing a card game with FIVE decks! On this note, congratulations.
Nevertheless, I have pretty harsh remarks to do on your design: -No cost for the cards means little to no strategy. You're just play them when you got them. -Multiple remarks on the attack system. The three capacities principle has a lot of potential, even if it is a little tricky to grasp. With more gimmicks, side objectives, multiple health bar, or auto block or debuff or forced attack of certain types maybe, it could have a lot of personality. -The dice idea is interesting, but randomness is not something I am personally searching in a strategy game. Could work for an auto-battler, or with less shift (using d3 instead of d6 for example), but at this moment, it is just attack without thinking. -There is no way to come back once you played all your cards and have no monster left while your opponent board is full. Even if you play a crazily strong monster, you are at the mercy of your opponent who can just ignore you and respond with capacities you can not defend against. This issue may be resolved with new card types, or with a system of rounds you have to win, or with bonus, such as auto drawing, you get if you get damaged.
Muster your ambition and you may give birth to something truly interesting.