Youll need to control three permanents from other players to unlock Arvinox as a creature, which you can do by reanimating creatures from their graveyards, using the ability of cards like Gonti, Lord of Luxury, or with Arvinoxs own ability
Nightmare Throne X SPELL Field When this card is activated: You can take 1 Fiend monster with 0 ATK/DEF from your Deck, and either add it to your hand or destroy it
KeyForgeINNER SLEEVES are optimized in size forKeyForgecards, a unique position in the market
Each 6-card pack contains 1 foil (any rarity), 1 rare or higher quality, 1 uncommon, 1 card of common or uncommon quality, and 2 commons
Discourtesy Clerk rewards you for accelerating your way to a bunch of Attractions, and with a good selection of cards in hand, you can easily get this ability online the turn it comes down