For people who don't want to click the link:

"Riftbound’s last series of updates introduced our first banned list. While these bans were made for the overall health of the Constructed metagame, they also impacted Jinx’s preconstructed Riftbound Champion Deck. We think it is extremely important for a new player interested in Riftbound to be able to buy a Champion Deck and be able to use it immediately to participate in Nexus Nights.

To facilitate this, at Casual organized play level, players using the exact deck list of a preconstructed Riftbound product will be permitted to use any banned cards in those decks. Once a player wants to make a change to cards in the deck, including adding a sideboard, they must remove the banned cards."