It stays unlocked, and all abilities of the full card are available to you
Boosters that are acquired outside of Arena, such as by using gold or scanning codes, will stay the same as they are now
Each pack has 14 cards, so youre getting 420 with this deal, and while theyre less likely to be the alternative art treatments youd find in a (grossly overpriced) Collector Booster pack, you could easily pull enough to build an Avatar deck around - or have plenty to trade with

#18: Recurring Nightmare Weve already touched on a few Recurring Nightmare decks this month, but the biggest win for the card has got to be Brian Seldens 1998 World Championship list: Creatures (24) 1 Spike Weaver 1 Verdant Force 1 Tradewind Rider 4 Wall of Blossoms 4 Birds of Paradise 1 Man-o'-War 2 Nekrataal 2 Uktabi Orangutan 2 Spike Feeder 2 Wall of Roots 1 Spirit of the Night 1 Orcish Settlers 1 Cloudchaser Eagle 1 Thrull Surgeon Lands (22) Spells (14) Sideboard While Recurring Nightmare is most often thought of as part of Survival of the Fittest strategies, it has also enjoyed a fair bit of success in B/G Rock decks, just using it for value and in combo decks seeking to loop it, with any number of creatures that effectively net you mana each time
Card Name Mana Cost Type Legendary Creature Human Noble Cleric Rarity Uncommon rules Text LifelinkWhenever Garnet attacks, you may remove a lore counter from each of any number of Sagas you control