I currently work on a system that gives every player their own deck of cards. The idea being that rhe player draw instead of roll. Every player gets their own favourite cards and abilities that trigger on specific cards or card types. For example every Ace is a critical success, every club (if that’s your color) deals double it’s value.
i play a cute cozy game called Littlewood. within the game, there’s a card game called Tarott Master (?). there are 5 elements and you create your own deck of 10 cards. each card represents a monster with 1 attack skill, 1 defense skill and 1 passive skill. it’s fun and simple, very easy to learn for new players.