My Cards Can Talk

This world is called the poker world. Here, skills, knowledge, artifacts and even life - all exist in the form of cards. You don't need to practice swordplay for ten years, you just need to get a "Basic Swordsmanship" card and inject it into your body – your muscles will "remember" how to swing the sword. You want flames? Activate a "Scorching" card and a fireball ignites in the palm of your hand. Do you want treatment? A "healing" card is placed on the forehead, and the wound heals on its own. But no one tells you what the cards are.