Interactions such as Ancient Greenwarden and Emancipation Angel make me excited to see which themes Wizards will expand upon once we reach Kaldheim and beyond in the new year
A few I can think of off the top of my head are Rogues, Zombies, and Faeries
I cant pay a thousand dollars just for a playset of a card I need. Between Spokane and Coeur dAlene, One Piece players can find a card shop holding a tournament nearly every night of the week
And if you want to play with a house rule that the Graaz player get perks if they shout Im the juggernaut! when they enter combat, hey, go nuts
I worked forever trying to make Hedron Alignment work, and the celebrations that ensued when the Hedrons finally Aligned were epic
It is up to you, and swapping between collections is easy