Theres protection, sure, but what about straight up just tanking damage and destruction
Some cards (like Karn, the Great Creator) make reference to cards outside the game, but it's not a zone
New cards like 'Aerith Gainsborough' that get's stronger when you gain life but then disperses her +1/+1 counters to her teammates when she dies or with 'Gilgamesh, Master-at-Arms' who let's you draw a bunch of cards and freely play any equipment cards onto the battlefield (too bad the card doesn't also play 'Battle on the Big Bridge' track)
If you play Pokemon Go, you know that if you catch any Pokemon, it could turn out to be a Ditto
However, when logging into Pokmon TCG Live for the first time, players will be able to transfer items from the Pokmon TCG Online to Pokmon TCG Live