You must reveal at least one card, provided your library has cards in it
Youll notice, on this screenshot, that the message in the bottom right tells you that youll need to buy a bundle, in order to use this particular card art
Its worth having a rulebook on hand when youre playing in your first few matches, no matter if this is in a formal setting or a casual one
At the beginning of each upkeep, create a 1/1 colorless Gnome artifact creature token
If you wish to trade with a different card, you either have to wait for your current trade to be completed or terminate the one you're currently doing
One of these cards will have the stained glass treatment too, the other card will be a Rare or a Mythic Rare either in traditional foil or non-foil from the Dominaria United set