Without context it is difficult to tell. I am guessing the breaking shield is probably some defense debuffing effect, and the sword flag might be an attack buffing effect (like a call to arms or something), etc. but really everything is just very broad (mostly due to potentially being used to represent a number of things). It's not necessarily terrible, once given context (i.e. once you learn what each symbol represents in-game) it probably will be no issue to remember what is what and the symbolism will seem much less broad.
As for running out of inspirations start looking up uncommon weaponry and armor, there is a lot of awesome
Indian,
Chinese,
Japanese,
etc. equipment that you could bend and twist to match the flavor of your game setting. At the moment, you're really showing with your cards there some very vanilla and over-used fantasy equipment. The 4th image on the top, for example, has swords about as basic and bare as it gets. Even with the limited space and low-detail of the art style there is no reason you couldn't make the handles more embellished and add some style or curvature to the blades (even as low-detail as
these ones are they still pull off some interesting shapes). A little extra spicing up on the helmet wouldn't hurt, either. Also, while not a necessity for the cards to look good, you could add a simple border to the cards to make them more card-like.
Don't get me wrong, I am not commenting on the quality of the art itself (it's good) I am commenting just on what is being depicted.
In any case, keep up the good work!
Developer
