Theyre creatures that get stronger whenever you play a land card (think of land like the gas that powers your decks engine) and have incredible synergy with other card types, leading to a deck that will overwhelm your opponent
Anna Braving the Storm gets even more value from your one-drop Heroes and Cinderella Knight in Training facilitates extra cycling
For instance, Coconut Basket lets you heal damage whenever you play a character, or Musketeer Tabard drawing cards whenever a Bodyguard is banished
So while I think the Birds deck could be cool, and Dark Confidant will revitalize black decks, Vivi Ornitier is going to slot right into Izzet Prowess, even if Cori-Steel Cutter gets banned
For players that want a more in depth look at what each card in all three Starter Decks does, the best thing to do is download the official Disney Lorcana companion app
An Enchanted card uses a rainbow hexagon