The set dives deep into the world of Impel Down and Marineford the two locations that define the Paramount War
Mistveil Plains is here to reload the goods like key elements and protect from graveyard exiling, and Roadside Reliquary is a colorless land that can be sacrificed to draw a card if you control artifacts and another if you control enchantments, so it can be two cards for one pretty reliably
In the 2025 partner sets Black Bolt & White Flair, a new rarity was introduced
The main difference is that this isnt done in a very consistent manner, Magic's changes in Standard are smaller and less frequent
Charismatic Conqueror lacks the first per turn limitation, plus the creatures/artifacts dont need to be cast, so you can profit off opposing flicker effects or Treasure creation, so it triggers more often
Perhaps what it really needs to go off is reliable card stacking, a la Congregation at Dawn or Senseis Divining Top