[dmitriid]

> It's also possible for a third party to create their own server to implement the game

No, it wouldn't be possible because the concept of IP and copyright exists regardless of blockchains.

[foerbert]

Neither apply to game mechanics.

Even if all the WotC IP ends up with the most determined patent troll ever, the game itself could still be implemented.

As for the card art... who knows what the legal situation would end up being. But even if it's totally legally off limits, the ability to load custom art would render it practically moot anyway.