Wizards of the Coast pre-bans some Arena cards to reduce unfun play, and the MTGA release is typically the Tuesday before the full set release
For reference, world is a defunct supertype that has legendary qualities
Support Party Member: Counterintuitively for a Rogue, but because of his deckbuilding limitations Preston works better as a support clue-gatherer, protecting teammates using his money, lending some resources when needed and generating extra actions to either perform time-consuming tasks that don't require tests, or discarding treacheries and weaknesses in the Investigators' Threat Areas
If your Buzzwole is on cooldown, simply retreat it either normally or with a Celesteelas ability then use Celesteela to place it back in and you can use Big Buzz again
As a beautiful and elegant psychic-type Pokmon, her Prismatic Evolutions SIR card needed to be stunning
While Emrakul, the Aeons Torn still sees fringe play as a sideboard option in various decks to foil Mill strategies (among other things in Indomitable Creativity), Emrakul, the Promised End now sees the most play