Trying to design a CCG/TCG. Can you give me some ideas/pics for inspiration for the card layout and icons. Or features to add.

I want a timeless and not fixed style that is easy to aesthetically update and with lots of room to experiment and try new ideas.

For resources I am thinking of using gem stones, maybe precious metals, shapes, or maybe more original markers for something no idea what for yet. I want the system to be beginner friendly and easy to start playing on the go but with many abilities and special abilities for more complex duels. Thinking of copying features from many distint TCGs.

What should I add that other TCGs often miss. Give any ideas.