Snapcaster Mage [The List] BT11-064 so this is one of

so this is one of several places where players can get a rare or mythic rare in a single Set Booster

Set: Sun & Moon: Forbidden Light Type: Dragon Rarity: Secret Rare Retreat cost: Colorless

and in this screen they tuck four cards in pockets numbered 1-4

then your opponent chooses 1 card in their hand and places it in their Drop Area

Snapcaster Mage [The List] BT11-064 so this is one ofSet: The List Type: Creature Human Wizard Rarity: Rare Cost: {1}{U} Flash When Snapcaster Mage enters the battlefield, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)