Direct answer
Objectives follow journal display order. Some depend on your choices; follow the active objective in the game.
Result
While travelling in Toussaint, Geralt learned of the existence of a new deck. It was inspired by the Skellige Isles and their inhabitants. Since the new Skellige faction had just made its debut, Geralt decided to seize the moment and gather all the cards belonging to it before other collectors could get their paws on them.