ravnica allegiance theme booster box Magic: The Gathering - Pack including at least one rare or mithic rare card. Ravnica Allegiance Booster Box

Then theres Magic Set Editor, which looks pretty cool

Promo Info BOOSTER BEGINNING OBSERVER [BT-16] CLOSECLOSE BT16-043 C Digimon Lv.4 Runnermon Color Green Form Champion Attribute Virus Type Beast DP 4000 Cost 4 Digivolve Cost 1 2 from Lv.3 Digivolve Cost 2 - Upper Text [Digivolve] [Pulsemon]: Cost 2 [On Play] [When Digivolving] If you have 3 or more security cards, suspend 1 of your opponent's Digimon

In November 2020, a pristine copy sold for close to $130,000 in an auction, remarkable for a base set card

While this could potentially be explained as an error, Eurogamer cites GAME staff (speaking under anonymity) who say they were told by management that the decision was deliberate