yugioh pure blue eyes deck Complete Custom for Yu-Gi-Oh! And It Can Access Your Blue Blue-Eyes Deck Breakdown | Guides,

Special Summon this card from your hand, then you can Set 1 Spell/Trap that mentions Dark Magician from your Deck

Number C103: Ragnafinity Rank 5 WATER Fairy-Type Xyz Effect Monster ATK 2800 DEF 2400 3 Level 5 monsters Once per turn, during either players turn: You can detach 1 Xyz Material from this card, then target 1 face-up monster your opponent controls

Black appreciates this effect more, particularly since white always has such an abundance of stuff along these lines (while black rarely gets anything remotely this good at this)

It's not designed to go in a card binder it's designed to get noticed

And it has complex rules and too many numbers

If you encounter a lot of combo decks, or decks that can quickly get out hand if they resolve a particular spell, then consider this Pact