Youre not supposed to buy and sell your card frequently.And you dont need to do transaction to use it on a blockchain game (that will only check if you possess the card) It is somewhat interesting, but I still dont see the adjacent possible for a killer app.The scarcity is still artificial, and the only thing that is secured by blockchain is ownership, not the information itself.So I see two barriers above and beyond the technical barriers you mentioned
Spells with cascade or rebound are very good for this purpose
Clear tape sealed case of PRB-01. See picture, cases all in similar condition as seen
censored versions), then this card actually has more alternate arts than Blue Eyes
While it may look like you dealt with five cards using Tome Scour, as is often all too cruelly the case in life, looks can be deceiving
This shop is recommended for those who want to choose from various types of cards or participate in events to battle with others using Pokemon Card