Theres a lot of flexibility with the Amethyst/Steel deck, especially if we see more Illusions in future Disney Lorcana sets
Most of the Jeskai Tempo decks only play two copies of Sarkhan, the Dragonspeaker as their planeswalker with the occasional deck playing one or two copies of Chandra, Pyromaster along with Sarkhan
An important distinction to make is that Dungeons aren't anything, really
For the aforementioned eight mana, you get an 8/8 flying vigilance Angel that is both indestructible and also provides that same indestructibility to every permanent you control
Field of Dreams At first glance, Field of Dreams looks like harmless table info, but it changes how people play almost immediately
Garland, Knight of Cornelia provides a decent early body with the upside of finding the cards you want or filling your graveyard