Each card features a different type of "ink," and guests match them to special stickers in a complimentary Festival Questbook
To be honest, I think this combo is more fun than efficient, as you need 4 cards to enable it, which is definitely not easy, but Ral itself has a scry ability, which helps you find pieces you need, and its hard to kill with his +2, so who knows
Each Play Booster contains 14 Magic: The Gathering cards, including 14 cards of rarity Rare or higher, 36 uncommon cards, 69 common cards, and 1 land card
Once it leaves the battlefield, it forgets the choices you made
Discard spells (such as Thoughtseize, Inquisition of Kozilek), cantrips (such as Serum Visions, Opt), countermagic (such as Mana Leak, Force of Negation, Drown in the Loch) or even removals (such as Fatal Push, Lightning Bolt, Kolaghan's Command, Drown in the Loch) are checking and slamming the battlefield
The creature's owner chooses whether to put it on the top or bottom of their library