one piece booster box display case Protector for OP-01 to OP-16 (01-02 Reprint) Featuring a magnetic top closure and 6mm thick acrylic Acrylic Display Case for One

That spell is none other than Odyssey Sorcery, Careful Study

During lunch, he learned of the Super Secret Number Card Investigation Club from Yuma's friends and asked Bronk Stone for membership

STAR Starlight Rare Limited Limited Exodia the Forbidden One X DARK Level 3 [ SpellcasterEffect ] ATK 1000 DEF 1000 If you have "Right Leg of the Forbidden One", "Left Leg of the Forbidden One", "Right Arm of the Forbidden One" and "Left Arm of the Forbidden One" in addition to this card in your hand, you win the Duel

Harpie Channeler gets you more Harpies, and once you have 3 they can combine to unleash their new pet: Harpies Pet Phantasmal Dragon