Senior game designer Daniel Holt explained that the decision to have each deck themed around one game allowed the team to "dive deep into the lore of each, capturing even more beloved moments from across the games storyline." When asked exactly how Wizards of the Coast came to choose the games that would be included in the crossover (I'm slightly disappointed Final Fantasy 9 didn't make the cut), Holt explained that Final Fantasy 7 and 14 were the clear picks due to their popularity, but that Final Fantasy 6 and 10 were chosen partially due to how many fans of those games were among the Wizards of the Coast team
Oblation Oblation allows a player to shuffle away a permanent they control to draw two cards, or send back an opponents permanent in exchange for letting them draw instead
The addition of Friends Forever can also let you team up with anyone with blue, like Dustin or Lucas
In the Dandan format, this is a one-mana way to clear all the titular fish from the board by temporarily removing the Islands they depend on
There are also a fair amount of rare cards to be found in the Sword & Shield - Brilliant Stars Trainer Gallery
Its Starbirth ability allows players to search their deck for any two cards, enabling powerful combos and precise strategies