This idea was the start of a genre that would emerge: the trading card game, or collectible card game
If your opponent(s) do decide to go the route of trying to find items to hide though, you can choose to just hide cards from your deck and if you want to be really fancy, claim something like "I'm hiding red blood cells
Abnormal Foil Textures Following the September 2021 release of Innistrad: Midnight Hunt, certain foils began to showcase a coarse, rough texture or a leather-like, wavy pattern, which can only be seen on the front side of the card
The Renew cards will put counters of various kinds, mostly +1/+1 counters, but they can be other numbers too
It also gets rid of the advantage in situations when drawing isn't optional
You can tell the top-down design here, where someone asked: If I design a card to be a moat, what would it look like? It might not be the most powerful, especially when decks dont necessarily need to attack to win, but its still cool and combines well with cards that enable flying