The graphic they added to the Mystery Booster packs had a square background, and the one they used for The List seems to have a rounded background, which creates a telltale difference in the shape of the cards border as you can see on Chatter of the Squirrel and Ancient Den as well as subtle changes in its placement on new border cards, as seen on Boros Challenger
in the real world, it is simply named after the comics and cartoon themselves
Here are a list of terms you'll see frequently and what they mean
Creeping Renaissance Creeping Renaissance can give you so much card advantage if you have a graveyard stacked with permanents of the same type
But then when I started to look it over from various angles I found the defects
The characters made part of the TCG adventure included Bashful, Christopher Robin, Cinderella, Elsa, Happy, King Louie, Mickey and Minie Mouse, Mulan, Snow White, The Queen, Arthur, Chip the Teacup, Jiminy Cricket, Baloo, Donald Duck, and many more