3m credit card sleeve M-Plateau Phone Wallet Stick on, Adhesive Slim Holder for cell phone and Phone Case Phone Card Holder Compatible with Most Smartphones (Black) : Cell Phones & Accessories Simple way to keep credit cards and IDs safe from unwanted scanning. Genuine Leather Cell Phone Credit

Maybe from dirt or smudges while transferring it from your bag to the receiver

This card can discard itself to send a Cyber Dragon from the deck to the graveyard to Special Summon itself and get you a Spell or Trap search

Compared to the original, I can't react to demons and traps, but now I feel the threat from monster effects is greater, so I don't feel lacking

Yes, on top of being reasonable extenders, these monsters each also boast an interactive effect, kind of like Therion (Coincidentally, another engine that might fit here)

Exodia, for those unfamiliar, lets you win the game when you have all 5 pieces of it in your hand