Buckshot roulette but with cards and a lovely art style.
The gameplay isn't really risky, as you are forced to engage with it, and whether you should draw or deal the card is a matter of basic probability.
An idea on how to make the game fit the theme more: kind cards heal 1 HP, and you have the opportunity to discard cards so neither you or the opponent get the damage/heal effect. This way, both trying to heal yourself and damaging your opponent are risky, and the player having the opportunity to disengage conflict means the risk is all the more emphasized.
Of course, this is just one idea out of many on how to improve the game, but I hope I got my point across.