Here, let me give you some of the context of other Swamps during this era of the game: What I've done is go back and forward a couple of years in time to share some other Swamps
When it attacks, it lets you look at the top 8 cards in your deck, pick one Dragon among them, and put it in play
Several cards care about casting creatures or creatures with certain attributes, so tutor for something good to trigger Silverback Elder or Kozilek's Unsealing
This isn't to say that Nadu also didn't deserve a ban due to it's power level, as it was a top deck played at the highest level of competitive Commander (aka CEDH)
2025-06-06 A transforming double-faced card enters with its front face up by default, unless a spell or ability instructs you to put it onto the battlefield transformed or allows you to cast it transformed, in which case it enters with its back face up