It may well signify an incoming batch of colorless-matters cards, perhaps as soon as Edge of Eternities
Reducing Auron's power below the exiled creature's power won't cause the exiled creature to return to the battlefield
All of them require cards from the new Final Fantasy MTG set
In regards to deck brewing, it doesnt leave too much room for creativity
No, these cards are intended for collection, display, or specific cooperative game modes and cannot be used in standard competitive decks
Keeping opposing characters exerted stops them from questing and opens them up to be challenged immediately or on the following turn, and characters like Archimedes, Electrified Owl, Elsa, The Fifth Spirit, and Vanellope Von Schweetz, Random Roster Racer are all great for dealing with opposing exerted characters