card sleeves holographic 100 Count Black for Trading Cards, Perfect Fit Shiny MTG Card Sleeves, Card Sleeve Fit for Magic, Photocard, TCG, Baseball/Sports Cards, Yugioh Card, Game Card 66 * 91 these sleeves are made to stand out Prismatic Defender® Holographic Card Sleeves

Those are called Link Arrows , and are one of the most defining features of Link Monsters

Psi-Reflector X DARK Level 1 [ Psychic / TunerEffect ] ATK 400 DEF 300 If this card is Normal or Special Summoned: You can add 1 "Assault Mode Activate" or 1 card that mentions it from your Deck to your hand, except "Psi-Reflector"

Once per turn, it can detach one of its materials to destroy a monster in the opponent's control, then it will inflict damage equal to that monster's original Attack Points

When its synchro summoned, you can equip this card with a Link monster from your graveyard

If you want to purchase more games instead of wasting money on expensive card sleeves, you should consider these Yu-Gi-Oh sleeves for protecting your cards

Yu-Gi-Oh Generate accurate small-format sheets with the right sizing and corner treatment