At the back of each card, at the end of the word "Deckmaster", a pen stroke is visible
Nephilabyss, the Ogdoadic Overlord X DARK Level 10 [ Reptile / Effect ] ATK 2200 DEF 3100 If a monster(s) is sent from the hand or Deck to the GY, while this card is in your GY (except during the Damage Step): You can Special Summon this card, also you cannot Special Summon monsters until the end of the next turn, except Reptile monsters
Notably, most modern booster packs include a Rare card and two equally collectible Reverse Holofoils (unless one is replaced by a higher rarity card)
Well, as it turns out, a few things
The most expensive ones are the 12 cards that feature alternate artwork in each set and are classified as having an Enchanted rarity status
Conspicuous Snoop Conspicuous Snoop wont see play outside of a dedicated Goblin Typal strategy, but it is arguably your best payoff for that strategy