[Playtester] Allow us to draw a random card from our sideboard (or maybe board)

{"ops":[{"insert":"This is inspired by something Gavin Verhey does when he's testing new cards at Wizards. He has a sidedeck of the new cards he's trying to test. Then he can draw random cards from that deck to see how it works in the main deck\n\nI'd love to have this as a feature so I can try cards that are outside of the maindeck but right now there's no one to pull in cards from the sideboard or maybe board\n"}]}