The problem is that like Syr Gwyn, the deck got repetitive, even with a new build and a bunch of new cards
They represented a return to a more traditional design aesthetic
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
You can get this card on the board for cheap, ambush one of their best creatures during an attack, and it leaves a good, chunky creature behind when it dies
any 1/1 creature that enters and connects with this in play deals 3 damage instead of 1, which sounds like pretty good math in my book
This "Super Secret Battle" is legendary in its own right, and collectors push and shove to get at one of these special cards