What input did Square Enix have in the actual design of the cards, beyond collaborating on the art
Matoya, Archon Elder is a sweet draw engine, and I can see her fitting into Kenessos sea creatures, Tales of Middle-earth blue-green decks like Elrond and Galadriel, and shell also just generally be a good engine piece in graveyard strategies that surveil a lot, like Mirko, Obsessive Theorist
Riftbound: League of Legends Lorcana One Piece Star Wars: Unlimited Gundam Bulk Magic: The Gathering Pokemon Yu-Gi-Oh
It captures the past and future of these specific characters, revealing more and more about their character development
Sudden Chill is more of a control card to remove one of the opponents Characters from play and slow down their pace immensely
While some may not want to totally give up all their card game secrets, this is a great way to expand one's knowledge of the game's cards and how they work together or against each other