Theres some sort of Bant Goodstuff shell that falls in around them, but nothing that actually makes the deck genuinely have a unique feeling on its first outing
The problem is that like Syr Gwyn, the deck got repetitive, even with a new build and a bunch of new cards
As well as this, it makes all your lands all MTG land types, perhaps allowing players to get a little experimental with the mana base, or ensuring all your games are super consistent
Its still something that wasnt intended like this, in which regard I completely agree with @deku : deku: Even if the error is a very common one (ie: Base set Vulpix HP) it still feels a bit special to me because you have something that was made on accident
The market is no longer a niche secret
This "Super Secret Battle" is legendary in its own right, and collectors push and shove to get at one of these special cards