You can tell a lot about what could be in someone's bulk by what is in their rare binders
Jim duels him in a desperate attempt to bring back his friend from the dark side, using his Orichalcum Eye to see into his heart, where it is revealed that the Supreme King is actually an entity that has possessed Jaden
4 Dragon Master Lords A Massive Quarter Century Dragon While not as impressive as Dragon Master Magia, Dragon Master Lords has one effect that makes you raise an eyebrow in interest
Black Lotus is the one potentially dangerous one with Hanna, Ship's Navigator, but we have only two things in-play that can untap her--Norritt, and bouncing her with Karakas, and certainly no way to untap her with mana alone--every route to untap her in the deck uses up non-mana resources that can't be replenished using only mana (either tapping a permanent, or sacrificing a permanent, or casting a spell)
collectors keep PRB-02 sealed due to its high collectible value and rare card content