United in Stormwind Cards List & Guide
As tittle says, I didnt realized the "Random card back" was actually a thing, never saw that before, but today I played a game when my cardback was the random art.
After the game I whispered the opponent to confirm if it was a visual bug on my client, but in fact the guy was also surprised to saw the random card back art as my card back.
Ive had random card back as my default choice for a good year and never seen that.
Wonder if it's a bug, but very cool!