The logic is this: your deck should be able to do things at every point in the game
The 6 Oversized promotional plane cards were added as well: Celestine Reef, Horizon Boughs, Mirrored Depths, Stairs to Infinity, Tazeem, and Tember City
You have to chump block something just so you can kill something else post combat
Soar into a sky bison's serving of Secret Lair drops when this Superdrop launches on November 17, available only at MagicSecretLair.com
This one is the most interesting to me because it can make things into 7/7 Dinosaurs
In-Game The cards mermaid-like flavor text echoes Vaporeons long-running game lore as Eevees Water-type evolution, a Pokmon so water-adapted that official Pokdex material describes its body as able to dissolve into water