MTR 7.4 Abnormal Product - Rules Resources

Neither Wizards of the Coast nor the Tournament Organizer guarantee any specific distribution of card rarities or frequency in a particular booster pack or tournament pack. If a player receives an unconventional distribution of rarities or frequencies in a particular booster pack or tournament pack, they must call a judge. The final decision to replace or allow the atypical product is at the discretion of the Head Judge and the Tournament Organizer.

It is recommended that Tournament Organizers allow the player who opened the irregular product to keep the pack, but provide them with a replacement pack for the remainder of the limited event. On the whole, the cost of the pack is less than the cost of a disruption that will occur if you attempt to do anything else.

Players should open and verify a pack one at a time. It gets messy if someone is missing an uncommon/has an extra uncommon and they find out after all 6 packs are opened.

If a player is missing a card, the Head Judge (with TO approval) can open a booster and pick a random card of that rarity to replace the missing one. If a player has an extra card, your options are to leave it, replace the whole pack, or have the player add a random card from the rarity of the extra one to their trade binder. It is generally best to minimize disruption to the pool by removing a card.

It is also worth noting that in the past Wizards of the Coast has rarely and (unintentionally?) put product from a future or previous set into a pack. If that occurs then this would also fall under the abnormal product policy listed here.