Nightmare Moon / Princess Luna provide an interesting multiplayer functionality by making friends while also referencing Nightmare Moon's affinity for the night and cards with Moons on them (Blood Moon, anypony?), and Twilight's abilities are obvious as the Princess of Friendship even if there aren't any Applejack, Fluttershy, Pinkie Pie, or Rainbow Dash cards to go with her yet (this means Wizards needs to get on the ball!)
Even premier auction houses have begun to partner with grading services, most notably Heritage Auctions partnering with WATA to authenticate and grade all of their retro video game items up for auction
Staying open means looking for opportunities
The multicolor aspect of this will make it favor three or more color decks and is definitely something to consider if youre playing Jegantha, The Wellspring or Niv-Mizzet Reborn
Pokmon V made their debut in the TCGs Sword & Shield expansion as more powerful versions of basic Pokmon, with more HP and stronger attacks, but with the risk-reward that they allow your opponent to claim two prize cards when defeated