While he's not broken by any means, I do like him as a solid card to put in when Jace, the Mind Sculptor is a little pricey
This is especially important when investing in rare or expensive singles
However, this build offers the potential to turn Zur into a creature-focused deck, similar to the way Yisan, the Wanderer BardYisan, the Wanderer Bard is built, though with some obvious and significant differences
Sure, a few cards will always disappoint or surprise us after they are deployed in action, but thats pretty uncommon
So, even though it's not destroying anything, you can actually prevent not only the Ba Sing Se that is already on the battlefield from making any relentless 2/2 attackers, but all future copies of Ba Sing Se
You might not be copying every creature you drop, but you at least have a chance to while this is on the board