The decks are not top tier but have some sound Mythic or Rare cards so you can jump-start your first MTG Arena decks
You can choose between Umara Wizard and Umara Skyfalls every time you draw it, based on which one you need right then
Firstly, more valuable cards are best placed into a card sleeve to stop any scratching to the surface

Ayara's Oathsworn Beseech the Mirror Beseech the Queen Bogbrew Witch Brainspoil Bringer of the Black Dawn Case of the Stashed Skeleton Coveted Prize Cruel Tutor Cynical Loner Dark Petition Demon's Herald Demonic Bargain Demonic Collusion Demonic Tutor Diabolic Intent Diabolic Intent Diabolic Tutor Dimir House Guard Dimir Machinations Emeritus of Woe Entomb Gravebreaker Lamia Grim Servant Grim Tutor Hoarding Broodlord Hour of Victory Illicit Shipment Imperial Seal Increasing Ambition Infernal Tutor Insatiable Avarice Liliana Vess Lively Dirge Mastermind's Acquisition Netherborn Phalanx Oriq Loremage Profane Tutor Razaketh's Rite Razaketh, the Foulblooded Rhystic Tutor Rune-Scarred Demon Servant of the Stinger Shred Memory Sidisi, Undead Vizier Smuggler Captain Splinter's Technique The Creation of Avacyn The Cruelty of Gix Urborg Panther Vampiric Tutor Vile Entomber Whisper Squad Wishclaw Talisman Witty Demon (playtest)

Standard sleeves measure about 66 mm by 91 mm, offering a snug fit for MTG cards
Naturally, theyll want to attack you, but thats where you take a shields up approach with removal and cards like Ghostly Prison